In species $X^{2+}$, the mass number is 20 and number of neutrons are 10 . Then calculate the number of electrons in species $X^{2+}$.

In species $X^{2+}$, the mass number is 20 and number of neutrons are 10 . Then calculate the number of electrons in species $X^{2+}$is 8 electron.

No. of protons $=20-10=10$;

No.  of $e^{-x}=8$

An atom's total number of protons and neutrons is its mass number. Although they might be the same, atoms of various elements typically have distinct mass values.