Which has more number of atoms, 100 g of sodium or 100 g of iron?

The number of atoms in 100 g Sodium is more than that of 100 g Iron.

Explanation

The atomic mass of sodium = 23 u

The gram atomic mass of sodium = 23 g

1 mole or 23 g of sodium has = 6.022 x 1023 atom

100 g of sodium has = 6.022×1023 / 23 x 100

= 2.618 x 1024 atom

Atomic mass of Iron (Fe) = 56 u

Gram atomic mass of Fe = 56 g

1 mole of Fe has = 6.022 x 1023 atom

56 g of Fe = 6.022 x 1023 atom

100 g of Fe = 6.022 x 1023 / 56 x 100

= 1.075 x 1024 atom

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