Question

The mass of an atom of sodium is 23 u. Calculate the
number of sodium atoms in 1 mg.
Take 1 u = 1.66 x 10^-27 kg.

the answer is 2.62×10^19
I need the process , to solve it
I need this asap​

Answer 1

Explanation:

Atomic mass= Number of neutrons + Number of protons.

For Na,N

n

=12,N

p

=11

23u=12+11

For, Na

+

, an electron is lost, but the atomic mass remains the same (23u) as that of Na.