A. nurture
B. iron
C. lay
D. contribute
6. A. duty B. mum /mʌm/ C. movement D. true /truː/
7. A. prepare B. together C. tend D. equal
8. A. sociable B. nurture /ˈnɜːtʃə(r)/ C. solution D. share
9. A. traditional B.career C. around D. washing /ˈwɑːʃɪŋ/
10. A. teeth B. strength C. with D. both
II. LANGUAGE FOCUS:
A. Choose the word whose underlined part is pronounced differently from the others.
1. A. picture B. nurture C. nature D. sure
2. A. aunt B. daughter C. sauce D. laundry
3. A. earn B. fear C. hear D. clear
1. A. away B. hat C. cap D. burn
2. A. soft B. bottle C. condition D. coffee
3. A. enough B. measure C. paragraph D. cough
4. A. daughter B. sauce C. children D. laundry
5. A. village B. walk C. water D. wall
B. Choose the underlined part that needs correction in each of the following sentences.
1. She has went to visit Susan. She’ll be back tomorrow.
A B C D
2. My mother doesn’t like rock music and I don’t too.
A B C D
3. I didn’t done any volunteer work lately.
A B C D
4. Your violin is the same with the one I’ve just bought.
A B C D
5. The weather today is not so hot as it is yesterday.
A B C D
6. Viet not got up early and do morning exercises yesterday.
A B C D
7. A lot of people are good artists and they are successfully in life.
A B C D
8. You should eat much junk food because you will be fat soon.
A B C D
9. There are any bottles of mineral water in the fridge.
A B C D
10. My father has buy the bike for me already.
A B C D
C. Choose the best answer a, b, c or d to complete the sentence.
1. We ___________ to the zoo next Sunday.
A. will goes B. shall go C. will go D. go
2. His daughter wants to become a well-known ___________ but she has no talent at all.
A. act B. actor C. actress D. action
3. I ___________any bread left for breakfast.
A. hasn’t got B. have got C. haven’t get D. haven’t got
4. There ___________ bottles of mineral water in the fridge.
A. are some B. are any C. is some D. am some
5. Let’s come to my house.
A. All right. B. You’re going
C. We go D. She goes
6. Nga is___________ a play for the school anniversary celebration.
A. rehearse B. rehearses C. rehearsing D. rehears
7. This morning, I didn’t have ___________ cup of coffee as usual.
A. some B. no C. a D. an
8. To ___________ successfully, they have to practise the play again and again.
A. perform B. play C. sing D. dance
9. When you have a temperature, you should drink more water and rest .
A. most B. most C. less D. more
10. He…..to the zoo last Sunday.
A. goes B. is going C. went D. will go
11. ……..- I’d love to.
A. Do you like to go swimming? B. Shall we go swimming?
C. Could you go swimming? D. Would you like to go swimming?
12. Would you like …..badminton?
A. to play B. play C. playing D. to. playing
13. If your hobby is greeting card making, you can give your to your friends as presents.
A. hobby B. products C. money D. greetings
14. What about ….. Ha Long Bay?
A. visiting B. to visit C. visit D. visited
15. He lectures to foreign tourists about traditional food and games recently.
A. gives B. gave C. has given D. have given
16. We have decided to ride to work it is good for their health and the environment.
A. so B. because C. but D. although
17. Daisy ___________busy tomorrow.
A. be B. shall be C. will is D. will be
18. Mozart was one of the most famous ___________ of classical music.
A. actors B. composers C. artists D. makers
19. Nam ___________some nice photos of our classmates.
A. has get B. hasn’t got C. has got D. has gotten
20. There ___________ yogurt in this carton.
A. isn’t any B. isn’t some C. aren’t any D. is any
21. Why don’t we play football?
A. OK, I’m sorry B. Good idea.
C. I love to D. You love to
22. They are___________ some experiments.
A. does B. doing C. dos D. do
23. Have you got ___________ butter in your fridge?
A. any B. a lot C. a D. an
24. What are you doing with all that paper and glue, Ngan? - I’m trying to ____ a collage
A. do B. play C. draw D. make
25. My younger sister has a very………………. character from me.
A. different B. as C. same D. like
26. We ought to take care……………… poor people.
A. in B. on C. with D. of
27.‘I think model making is an expensive hobby.’ ‘…………… it’s incredibly cheap.’
A. You’re right B. Certainly C. No matter D. Not at all
28. He has written so many pieces of music. He is a well-known……………….
A. writer B. poet C. musician D. comedian
29. Do you think that playing outside all day will make you get ………………….?
A. a sore throat B. a toothache C. sun burn D. a cold
30. If you eat that strange food, you may get a/an ………………….
A. backache B. allergy C. fever D. temperature
III. Reading.
A. Read the passages carefully, fill in the blanks with correct words.
a) Artists who (1)… pictures on the pavement with chalk used to be a common sight in London, but there (2)….only a few left now. Sometimes the pictures are very good. This is proved by the fact that one of the (3)….. favourite tricks is to draw a five-pound note and see a lot of people trying to (4)….. it up. The police usually treat pavement artists kindly and there is nothing in the law against drawing on the pavement unless the artist is so good that he gets a large (5)….. around him and this prevents other people from passing freely along the street.
1. A. draw B. paint C. take D. print
2. A. is B. are C. was D. were
3. A. artist B. artist’s C. artists D. artists'
4. A. pick B. hold C. bring D. get
5. A. meeting B. collection C. gathering D. crowd
b) I have a very interesting and (1) hobby. I make short video clips with my digital camera. It was my birthday present from my parents last year. Since then, I have (2) three short films. It’s great fun! I started asking my friends and relatives to take (3) in the films. I have tried to write the story for my video clips. When I have finished the script, 1 make copies for the “actors”. Each scene is small and they can look at the words just (4) we start filming. We film at the weekend in my neighbourhood, (5) no one has to travel far. When the video clip is finished, I invite all the “actors” and we watch the film at my house.
1. A. enjoy B. enjoyed C. enjoying D. enjoyable
2. A. done B. played C. made D. watched
3. A. part B. role C. scene D. film
4. A. before B. after C. only D. until
5. A. although B. because C. but D. so
c) Ann lives in London. She is twenty-nine years old and (1) … for the ABC. She interviews people on an early morning (2)…. called The World Today. Every week, she gets up at 3.00 in the morning because the program starts at 6.30. She loves her work because it is (3) …. and she meets a lot of very interesting (4)…. ,but she loves her weekends, too.
On (5) ….. evening, she goes out. Sometimes her friends come and they cook dinner. Ann loves cooking. They listen to music or just chat.
1. A. works B. eats C. watches D. plays
2. A. sister B. programme C. brother D. daughter
3. A. and B. with C. interesting D. about
4. A. farmers B. cleaners C. drivers D. people
5. A. Friday B. first C. second D. third
B. Read the passage carefully. CIRCLE True (T) or False (F) for each sentence.
a) Some interesting facts about Vietnamese food
- Viet Nam has the 2nd largest rice production in the world (only smaller than that of Thailand).
- People in Viet Nam eat the largest amount of instant noodles in Asia. They even eat more instant noodles than people in Japan – the home country of this type of food.
- Viet Nam has many kinds of noodles, such as pho, bun (vermicelli), mien (grass noodle), and banh da (rice noodle).
- Spring roll (nem ran) is the most popular dish in Viet Nam. It usually isn’t served as an everyday meal – mostly at a family gathering or anniversary dinner.
- Viet Nam has a large variety of che (sweet soup), with more than 100 kinds from the North to the South.
- Viet Nam has nearly 200 kinds of cakes with various shapes and tastes. Some of them are not really made from butter and flour, like banh chung or banh gai.
True (T) or False (F)
1. Thailand has the largest rice production in the world. …………
2. Japanese people eat more instant noodles than Vietnamese people. …………
3. In Viet Nam, spring rolls are served mostly at a family gathering or anniversary dinner.
…………
4. There are more than 100 kinds of sweet soup in Viet Nam. …………
5. Cakes in Viet Nam are made from butter and flour. …………
b) Volunteering is one of the things that are very useful to you. To your future bosses, volunteer work shows that you are interested in both the world and your future.
Although volunteer work does not bring you money, it gives you a time to learn social skills and make a difference in our community. Volunteers have the chance to teach English, arts, and sports for homeless children. They also help children with health problems, especially children who cannot see, hear and speak.
True (T) or False (F)
1. Doing volunteer work is very useful to you. …………
2. Volunteering is good for your future job. …………
3. You can earn a lot of money from volunteering. …………
4. Volunteers can help homeless children to learn English, arts, and learn how to play sports. …………
5. Volunteers only help healthy children. …………
c)There are many kinds of musical instrument and people listen to music all over the world. They turn on music in parties, club, weddings and restaurants as well. People like music because it helps them forget sadness and makes them feel more love in life. After a hard working day, people come back home and feel so tired. Music now can help them close their eyes and relax themselves. Sometimes it is difficult to understand music, but people still enjoy it.
True (T) or False (F)
1. People don’t listen to music all over the world. …………
2. They turn on music in parties, club, weddings and restaurants as well. …………
3. It helps them forget sadness and makes them feel more love in life. …………
4. They feel so tired. …………
5. It is easy to understand music. …………
IV. Do as directed:
1. kilos / how many / would / potatoes / of / like / you /? (Rearrange the sentences)
>…………………………………………………………………………………………
2. Her phone is not the same as mine. (Rewrite the sentences)
—.>Her phone is……………………………………………………..………………..
3. but / went / I / fish / I / fishing / catch / didn’t / any /. (Rearrange the sentences)
>…………………………………………………………………………………………
4. Our school years starts on September 5th. (Make a question for the underlined words)
→.…………………………………………..…………………………………………?
5. in/ city/ busy/ life/ is/ the/ always.(Rearrange the sentences)
→…………………………………………………………………………………………
6. Hoa hates the noise and the busy roads in the city.(Rewrite the sentence )
→ Hoa doesn’t.……………………………………………..……………………………
7. sports/ he/ the/ in/ often/ plays/ evening.(Rearrange the sentences)
→…………………………………………………………………………………………
8. electric cooker / how much / in / rice / left / the / is /? (Rearrange the sentences)
>………………………………………………………………………………………
9. I think rock music is more popular than jazz. (Rewrite the sentences)
—> I think jazz music isn’t………………………………………………………………
10. Vietnam / most / Pho / of / the / popular / is / one / dishes / in /. (Rearrange the sentences)
>…………………………………………………………………………………………
11. I went to the cinema with my cousins. (Make question for the underlined words)
>…………………………………………………………………………………………
12. I saw him 6 years ago. (Make question for the underlined words)
>…………………………………………………………………………………………
13. We like to collect book because it is very interesting. (Make question for the
underlined words)
>…………………………………………………………………………………………
Combine sentences
1. My mother's favorite food is noodle. My favorite food is rice. (different………. from)
>…………………………………………………………………………………………
2. Playing piano is difficult. playing guitar is difficult. (as ………….. as)
>…………………………………………………………………………………………
3. I want to buy other car. I have no money. (but)
>…………………………………………………………………………………………
Writing (in about 40 - 60 words)
1. Write a letter to your friend to invite your friend to an art exhibition.
2. What can students do to help the community?
---o0o---
Giúp mình với nhé :)
Bạn gửi ít thôi mình ngại làm lắm
*. Stress
1. A. enormous B. vulnerable C. contribute D. exactly
2. A. excited B. irregular C. attachment D. talent
3. A. skeleton B. intestine C. grandparent D. similar
4. A. contestant B. routine C. consist D. laundry
5. A. adore B. achievement C. composer D. passionate
6. A. competition B. system C. format D. debut
7. A. album B. compose C. begin D. remain
8. A. contestant B. general C. recognise D. confident
9. A. debut B. contrast C. broadcast D. repeat
10. A. husband B. brother C. vessel D. effect
*. Stress
1. A. enormous B. vulnerable C. contribute D. exactly
2. A. excited B. irregular C. attachment D. talent
3. A. skeleton B. intestine C. grandparent D. similar
4. A. contestant B. routine C. consist D. laundry
5. A. adore B. achievement C. composer D. passionate
6. A. competition B. system C. format D. debut
7. A. album B. compose C. begin D. remain
8. A. contestant B. general C. recognise D. confident
9. A. debut B. contrast C. broadcast D. repeat
10. A. husband B. brother C. vessel D. effect
Mark the letter A, B, C or D to indicate the sentence that is closest in meaning to each of the following questions.
47. You should wash and iron your own clothes.
A. Wash and iron your own clothes!
B. Don’t wash and iron your own clothes!
C. Doesn’t wash and iron your own clothes!
D. Not wash and iron your own clothes!
48. His neighbourhood is safe, while my neighbourhood isn’t.
A. His neighbourhood is safe, while I isn’t.
B. His neighbourhood is safe, while me isn’t.
C. His neighbourhood is safe, while mine isn’t.
D. His neighbourhood is safe, while my isn’t.
49. My sister can sing English songs very well.
A. How can my sister sing English songs?
B. How your sister can sing English songs?
C. How can your sister sing English songs?
D. How your sister can sing English songs?
50. VTV1 attracts millions of viewers because it offers many different interesting programmes.
A. Although VTV1 has many different interesting programmes.
B. VTV1 is only appealing to viewers who like thrilling programmes.
C. A large number of TV viewers are drawn towards VTV1 because of its variety of interesting programmes.
D. VTV1 attracts millions of viewers, so it must offer many different interesting programmes.
51. I am very busy today. I can't go to the cinema with you.
A. I am very busy today, but I can't go to the cinema with you.
B. I am very busy today, so l can't go to the cinema with you.
C. Although I am very busy today, I can't go to the cinema with you.
D. I am very busy today because I can't go to the cinema with you.
52. Will you come to the judo club with me on Sunday?
A. Do you often come to the judo club on Sunday?
B. Will you take me to the judo club on Sunday?
C. Would you like to come to the judo club with me on Sunday?
D. Do you prefer coming to the judo club with me on Sunday?
53. It is very cold. Put on your coat.
A. It is very cold, but you should put on your coat.
B. Cold weather makes coats sell well.
C. You should put on your coat to protect yourself from the cold weather.
D. Put on your coat, or the weather will be cold.
Mark the letter A, B, C or D to indicate the sentence that has a completed meaning by using the words/ phrases given.
54. He/ usually/ go/ swimming/ friends
A. He usually going swimming with his friends.
B. He usually goes swimming his friends.
C. He usually go swimming with his friends.
D. He usually goes swimming with his friends.
55. The students/ go camping/ next Sunday
A. The students go camping next Sunday.
B. The students are go camping next Sunday.
C. The students will go camping next Sunday.
D. The students went camping next Sunday.
56. My friend/ go shopping/ mother/ last Sunday.
A. My friend go shopping with her mother last Sunday
B. My friend goes shopping with her mother last Sunday
C. My friend went shopping with her mother last Sunday.
D. My friend went shopping her mother last Sunday.
57. When/ my brother and I/ be/ small, we/ go/ cycling/ every weekend
A. When my brother and I was small, we went cycling every weekend.
B. When my brother and I was small, we went to cycling every weekend.
C. When my brother and I were small, we went cycling every weekend.
D. When my brother and I were small, we went to cycling every weekend.
58. He/ like/ watch/ cartoons/ TV/ after school.
A. He likes watch cartoons on TV after school.
B. He likes watching cartoons by TV after school.
C. He like watching cartoons on TV after school.
D. He likes watching cartoons on TV after school.
47. You should wash and iron your own clothes.
A. Wash and iron your own clothes!
B. Don’t wash and iron your own clothes!
C. Doesn’t wash and iron your own clothes!
D. Not wash and iron your own clothes!
48. His neighbourhood is safe, while my neighbourhood isn’t.
A. His neighbourhood is safe, while I isn’t.
B. His neighbourhood is safe, while me isn’t.
C. His neighbourhood is safe, while mine isn’t.
D. His neighbourhood is safe, while my isn’t.
49. My sister can sing English songs very well.
A. How can my sister sing English songs?
B. How your sister can sing English songs?
C. How can your sister sing English songs?
D. How your sister can sing English songs?
50. VTV1 attracts millions of viewers because it offers many different interesting programmes.
A. Although VTV1 has many different interesting programmes.
B. VTV1 is only appealing to viewers who like thrilling programmes.
C. A large number of TV viewers are drawn towards VTV1 because of its variety of interesting programmes.
D. VTV1 attracts millions of viewers, so it must offer many different interesting programmes.
51. I am very busy today. I can't go to the cinema with you.
A. I am very busy today, but I can't go to the cinema with you.
B. I am very busy today, so l can't go to the cinema with you.
C. Although I am very busy today, I can't go to the cinema with you.
D. I am very busy today because I can't go to the cinema with you.
52. Will you come to the judo club with me on Sunday?
A. Do you often come to the judo club on Sunday?
B. Will you take me to the judo club on Sunday?
C. Would you like to come to the judo club with me on Sunday?
D. Do you prefer coming to the judo club with me on Sunday?
53. It is very cold. Put on your coat.
A. It is very cold, but you should put on your coat.
B. Cold weather makes coats sell well.
C. You should put on your coat to protect yourself from the cold weather.
D. Put on your coat, or the weather will be cold.
Mark the letter A, B, C or D to indicate the sentence that has a completed meaning by using the words/ phrases given.
54. He/ usually/ go/ swimming/ friends
A. He usually going swimming with his friends.
B. He usually goes swimming his friends.
C. He usually go swimming with his friends.
D. He usually goes swimming with his friends.
55. The students/ go camping/ next Sunday
A. The students go camping next Sunday.
B. The students are go camping next Sunday.
C. The students will go camping next Sunday.
D. The students went camping next Sunday.
56. My friend/ go shopping/ mother/ last Sunday.
A. My friend go shopping with her mother last Sunday
B. My friend goes shopping with her mother last Sunday
C. My friend went shopping with her mother last Sunday.
D. My friend went shopping her mother last Sunday.
57. When/ my brother and I/ be/ small, we/ go/ cycling/ every weekend
A. When my brother and I was small, we went cycling every weekend.
B. When my brother and I was small, we went to cycling every weekend.
C. When my brother and I were small, we went cycling every weekend.
D. When my brother and I were small, we went to cycling every weekend.
58. He/ like/ watch/ cartoons/ TV/ after school.
A. He likes watch cartoons on TV after school.
B. He likes watching cartoons by TV after school.
C. He like watching cartoons on TV after school.
D. He likes watching cartoons on TV after school.
47. You should wash and iron your own clothes.
A. Wash and iron your own clothes!
B. Don’t wash and iron your own clothes!
C. Doesn’t wash and iron your own clothes!
D. Not wash and iron your own clothes!
48. His neighbourhood is safe, while my neighbourhood isn’t.
A. His neighbourhood is safe, while I isn’t.
B. His neighbourhood is safe, while me isn’t.
C. His neighbourhood is safe, while mine isn’t.
D. His neighbourhood is safe, while my isn’t.
49. My sister can sing English songs very well.
A. How can my sister sing English songs?
B. How your sister can sing English songs?
C. How can your sister sing English songs?
D. How your sister can sing English songs?
50. VTV1 attracts millions of viewers because it offers many different interesting programmes.
A. Although VTV1 has many different interesting programmes.
B. VTV1 is only appealing to viewers who like thrilling programmes.
C. A large number of TV viewers are drawn towards VTV1 because of its variety of interesting programmes.
D. VTV1 attracts millions of viewers, so it must offer many different interesting programmes.
51. I am very busy today. I can't go to the cinema with you.
A. I am very busy today, but I can't go to the cinema with you.
B. I am very busy today, so l can't go to the cinema with you.
C. Although I am very busy today, I can't go to the cinema with you.
D. I am very busy today because I can't go to the cinema with you.
52. Will you come to the judo club with me on Sunday?
A. Do you often come to the judo club on Sunday?
B. Will you take me to the judo club on Sunday?
C. Would you like to come to the judo club with me on Sunday?
D. Do you prefer coming to the judo club with me on Sunday?
53. It is very cold. Put on your coat.
A. It is very cold, but you should put on your coat.
B. Cold weather makes coats sell well.
C. You should put on your coat to protect yourself from the cold weather.
D. Put on your coat, or the weather will be cold.
Mark the letter A, B, C or D to indicate the sentence that has a completed meaning by using the words/ phrases given.
54. He/ usually/ go/ swimming/ friends
A. He usually going swimming with his friends.
B. He usually goes swimming his friends.
C. He usually go swimming with his friends.
D. He usually goes swimming with his friends.
55. The students/ go camping/ next Sunday
A. The students go camping next Sunday.
B. The students are go camping next Sunday.
C. The students will go camping next Sunday.
D. The students went camping next Sunday.
56. My friend/ go shopping/ mother/ last Sunday.
A. My friend go shopping with her mother last Sunday
B. My friend goes shopping with her mother last Sunday
C. My friend went shopping with her mother last Sunday.
D. My friend went shopping her mother last Sunday.
57. When/ my brother and I/ be/ small, we/ go/ cycling/ every weekend
A. When my brother and I was small, we went cycling every weekend.
B. When my brother and I was small, we went to cycling every weekend.
C. When my brother and I were small, we went cycling every weekend.
D. When my brother and I were small, we went to cycling every weekend.
58. He/ like/ watch/ cartoons/ TV/ after school.
A. He likes watch cartoons on TV after school.
B. He likes watching cartoons by TV after school.
C. He like watching cartoons on TV after school.
D. He likes watching cartoons on TV after school.
9. A. clothes B. fold C. groceries D. iron
1. A. iron B. spin C. fire D. wireless
2. A. electric B. penthouse C. apartment D. record
3. A. ocean B. cleaner C. cook D. ecosystem
4. A. marine B. pollutant C. radiator D. apartment
Ai làm nhanh nhất em cho 1 tick nha !!!!
1. A. iron B. spin C. fire D. wireless
2. A. electric B. penthouse C. apartment D. record
3. A. ocean B. cleaner C. cook D. ecosystem
4. A. marine B. pollutant C. radiator D. apartment
1. A. iron B. spin C. fire D. wireless
2. A. electric B. penthouse C. apartment D. record
3. A. ocean B. cleaner C. cook D. ecosystem
4. A. marine B. pollutant C. radiator D. apartment
II Find the word which has a different stress pattern from the others
1 A favourite B pollution C imagine D exhausted
2 A energy B plentiful C disappear D celebrate
C contribute D atmosphere
4 A prefer B important C enormous D convenient
1 A (TR.Â1)
2 C (TR. 3)
3 D (TR. 1)
4 B ( Tr. 1)
5 A ( Tr. 1)
Choose the word pronounced differently from the other words
1. A. attraction B. artisan C. frame D. handicraft
2. A. drumhead B. uncle C. product D. business
3. A. conical B. knit C. artisan D. remind
4. A. folk B. stone C. iron D. gold
5. A. embroider B. preserve C. specific D. enjoyble
6. A. generation B. frame C. artisan D. famous
7. A. museum B. cultural C. drum D. sculpture
8. A. tablecloth B. authenticity C. through D. although
9. A. attraction B. traditional C. lacquerware D. handicraft
10. A. weave B. treat C. deal D. drumhead
11. A. sculpture B. lantern C. pottery D. treat
12. A. pottery B. product C. workshop D. conical
13. A. surface B. layer C. frame D. birthplace
14. A. carved B. impressed C. embroidered D. weaved
15. A. specific B. special C. pieces D. place
16. A. embroider B. region C. pottery D. lantern
17. A. marble B. artisan C. carve D. handicraft
18. A. villages B. pieces C. loses D. provides
19. A. layers B. bamboos C. crafts D. weaves
20. A. carves B. casts C. moulds D. embroiders
Choose the word pronounced differently from the other words
1. A. attraction B. artisan C. frame D. handicraft
2. A. drumhead B. uncle C. product D. business
3. A. conical B. knit C. artisan D. remind
4. A. folk B. stone C. iron D. gold
5. A. embroider B. preserve C. specific D. enjoyble
6. A. generation B. frame C. artisan D. famous
7. A. museum B. cultural C. drum D. sculpture
8. A. tablecloth B. authenticity C. through D. although
9. A. attraction B. traditional C. lacquerware D. handicraft
10. A. weave B. treat C. deal D. drumhead
11. A. sculpture B. lantern C. pottery D. treat
12. A. pottery B. product C. workshop D. conical
13. A. surface B. layer C. frame D. birthplace
14. A. carved B. impressed C. embroidered D. weaved
15. A. specific B. special C. pieces D. place
16. A. embroider B. region C. pottery D. lantern
17. A. marble B. artisan C. carve D. handicraft
18. A. villages B. pieces C. loses D. provides
19. A. layers B. bamboos C. crafts D. weaves
20. A. carves B. casts C. moulds D. embroiders
1 C
2 D
3 D
4 C
5 C
6 C
7 A
8 D
9 B
10 D
11 D
12 B
13 A
14 B
15 B
16 B
17 D
18 B
19 C
20 B
Câu 9: Hạt nhân một nguyên tử iron có 26 proton và 30 neutron. Khối lượng của nguyên tử iron xấp xỉ
là
A. 26 amu. B. 30 amu. C. 82 amu. D. 56 amu.
Câu 9: Hạt nhân một nguyên tử iron có 26 proton và 30 neutron. Khối lượng của nguyên tử iron xấp xỉ
là
A. 26 amu. B. 30 amu. C. 82 amu. D. 56 amu.
Để tính khối lượng của nguyên tử iron, ta cần tính tổng khối lượng của proton và neutron trong hạt nhân. Khối lượng của proton là xấp xỉ 1 amu và khối lượng của neutron cũng xấp xỉ 1 amu. Vậy tổng khối lượng của proton và neutron trong hạt nhân là 26 amu + 30 amu = 56 amu. Vậy đáp án là D. 56 amu.