Question

Atomic number of cation is M2+ how many electrons are present in it

Answer 1

the electrons in it is equal to no of protons

but there is only one difference

i.e no of electrons is 2

less

for example if the atomic no is 12

then it has

6 protons

6 electrons

so cation M2+ means it has

6 protons

but 6-4 electrons

i.e 4 electrons