which element contains the greatest number of atoms?

4g he 46g na 0.40 ca 12g he

why?justify your answer?

4g of He contain: 6.022*10²³ * 4/2

= 12.044*10²³ atoms

46g of Na contain: 6.022*10²³ * 46/23

= 12.044*10²³ atoms

0.40g of Ca contain: 6.022*10²³ * 0.4/40

= 6.022*10²¹ atoms

12g of He contain: 6.022*10²³ * 12/2

= 36.13*10²³ atoms

Therefore 12g of He contains the largest number of atoms.