Q: Atomic mass of an element is equal to the sum of number of
(a)electrons and protons only
(b)protons and neutrons only
(c)electrons and neutrons only
(d)electrons, protons and neutrons
Correct Answer: (b)
The correct answer is (c): electrons and neutrons only. Subject: Science & Technology | Sub-topic: Chemistry Note: This answer was determined through AI-based research. Verify against the official answer key when available.