Question

Which of the following are true for an element ?
(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 neutrons
(iv) Atomic number = number of protons = number of electrons
A. I and ii
B. I and iii
C. ii and iii
D. ii and iv

Answer 1

Correct Answer - d
correct answer d The statement ii and iv are both correct