m nguyên tử = 24u + 26u + 24.0,00055u ≈ 50u
=> m nguyên tử = 50.1,6605.10^-24 = 8,3025.10^-23 g
=> 10 g Cr có 10:(8,3025.10^-23)=1,2045.10^23 nguyên tử
Trong 10 g Cr
p=e=1,2045.10^23 .24= 2,89.10^24
n=1,2045.10^23 .26= 3,1317.10^24
m nguyên tử = 24u + 26u + 24.0,00055u ≈ 50u
=> m nguyên tử = 50.1,6605.10^-24 = 8,3025.10^-23 g
=> 10 g Cr có 10:(8,3025.10^-23)=1,2045.10^23 nguyên tử
Trong 10 g Cr
p=e=1,2045.10^23 .24= 2,89.10^24
n=1,2045.10^23 .26= 3,1317.10^24