Question

If Mg2+ has 12 protons and 12 neutrons what is the atomic number and mass number?

Answer 1

Answer:

atomic no. 12

mass no. 24

Explanation:

Z=atomic no.=no. of proton= no. of electron (if atom is neutral)

so atomic no.of Mg2+ will be 12

A=mass no. =no. of neutron+atomic no. OR no.of proton +no.of neutron so mass no. of Mg2+ will be 24