Question

Mass-number of an atom is the sum of the numbers of:
(A) neutrons and protons
(B) protons and electrons
(C) neutrons and electron
(D)
Both (A) & (C)​

Answer 1

Answer:

Mass-number of an atom is the sum of the numbers of no of neutrons and protons

PLEASE MARK THE ANS AS BRAINILIST

Answer 2

Answer:

A) neutron and protons.

Hope its helpful... If helpful mark as brainliest.