Question

An atom has 12 electrons and a mass number of 24. How many neutrons does it have?

Answer 1

@heartbreak
Its neutrons are 12 since you need to subtract the mass number to the number of electrons.
Hope this helps. :)

Answer 2

Atomic mass (24) - atomic number (12) = 12

Answer 3

so 12 neutrons :)

Answer 4

yep, it's 12