Bài 2: Tổng số hạt electron,proton, notron trong nguyên tử nguyên tố R là 36, trong đó số hạt không mang điện bằng nửa số hạt mang điện.
a. Xác định số P,E,N,Z+,M của R?
b. Viết kí hiệu nguyên tử của R
GIÚP EM VS Ạ!!!!! EM CẦN GẤP VÀ LỜI GIẢI CHI TIẾT Ạ.
CẢM ƠN <3
GIVE THE CORRECT TENSE OF THE VERBS IN BRAKETS
1. He (live)...... in HCM city for ten years.
2. My father (work)..... in this factory since 1990.
3. when I (arrive).... at his house, she still (sleep)....
4. the light(g).... out while we (have)..... dinner
5. Bill (have) .... breakfast when I (stop).... at his house this morning
6. they(go)... home after they (finish)..... their work.
7. when i (come)..... to the stadium, the match (already, begin)....
8. Before she (watch)..... TV, she (do)..... her homework.
9. it was the first time t (never, see)..... such a beautiful girl
10. i (be)..... very tired, because i (work).... all day yesterday.
11. the bell (ring)..... while Tom (take).... a bath
12. he (sit).... in cafe when i (see)... him.
13. some student (give)..... schoolarship last week.
14,. when they (came)... we(go)..... out for half an hour.
15. i(give) up smokingh next week.
16.Jill(be).... 16 next Saturday
17. she said that she (already, see)..... Dr. Rice
18. i (not talk).... to him because when i (arrrive)..... he already (leave)...
19. they just (close)...... the shop when i (get) there .
GIÚP EM VỚI Ạ
MƠN NHIỀU <3
VII. Give the correct tense form of the verbs in brakets:
1. My father(work)..... i this factory for many years.
2. linh (study)... medicine. She (be).....a doctor
3.The sun (set)... i the West
4. Nam (never/go).....to bed before 10p.m
5. She (do ) her housework at present
6. What(you/do)... now?
7. Mary (read).... this book three time.
10. My mother (go)..... to the market every morning.
giúp mình vs ạ, mình cầ cấp!
mơn trc <3