Question

Which of the following statements is/ are correct about neutral elements?

(i) Atomic number = number of protons = number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic number = number of protons + number of electrons
(iv) Mass number = number of neutrons = number of electrons

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (i) and (iv)
• D. (ii) and (iv)

Answer 1

The correct option is A (i) and (ii)

Atomic number gives the number of protons present in an atom. It also represents the number of electrons in the orbits/shells.
Mass number represents the sum of total number of protons and neutrons present in the nucleus of an atom.