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Order the following elements from most atoms in 1 g at the top to fewest atoms in 1 g at the bottom.
Most atoms | [ Select ] ["beryllium", "magnesium", "strontium", "calcium"] |
Second most atoms | [ Select ] ["magnesium", "beryllium", "strontium", "calcium"] |
Second fewest atoms | [ Select ] ["beryllium", "magnesium", "calcium", "strontium"] |
Fewest atoms | [ Select ] ["beryllium", "calcium", "strontium", "magnesium"] |
Number of atoms = (mass/atomic mass)*No
Here No is avagadro number = 6.022*10^23
For beryllium ,
Number of atoms (n) = (1/9)*6.022*10^23 = 6.69*10^22
For magnesium ,
Number of atoms (n) = (1/24)*6.022*10^23 = 2.51*10^22
For calcium ,
Number of atoms (n) = (1/40)*6.022*10^23 = 1.51*10^22
For strontium ,
Number of atoms (n) = (1/87)*6.022*10^23 = 6.922*10^21
From the above ,
Most atoms - beryllium
Second most atoms - magnesium
Second fewest atoms - calcium
Fewest atoms - strontium
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