Question

If the atom of an element ‘A’ contains four neutrons, four protons and two electrons, then the charge on ‘A’ will be

• A.
  +1
• B.
  +2
• C.
  -2
• D.
  +3

Answer 1

The correct option is B

+2
Charge on a single atom = Number of protons – Number of electrons

An atom of element ‘A’ has four protons and two electrons.

$\therefore$ Charge on an atom of element $‘A^{\prime }=4–2=+2$

Hence, the correct answer is option (b).