Question

Why the number of atoms of bromine in 1 mole Br₂ is not equal to Avogadro's number?

Answer 1

Because Bromine is a diatomic element.

Explanation:

Bromine is a diatomic element, therefore, in `1 "mol"` of `Br_2` there is Avogadro's number molecules of `Br_2` and there is twice Avogadro's number atoms of `Br`.

Answer 2

Why not? Because the bromine molecule is made of `2` atoms of bromine. Are we clear?

Explanation:

I could have Avogadro's number of any species: electrons, protons, atoms, molecules. Here I have a 1 mole of bromine molecules . Each bromine molecule consists of 2 atoms of bromine . So in my mole of molecules I have `2` `xx` `N_A` of bromine atoms (`N_A =` Avogadro's number).If I have a mole of methane molecules, `CH_4`, then how many hydrogen atoms do I have?

Answer 3

Bromine is a diatomic molecule, i.e, has two atoms.

Explanation:

I mole or bromine refers to 6×10^23 molecules of bromine.
But 1 molecule of bromine has 2 atoms.
Hence the atom count will be exactly twice.