The mass number of a substance represents the sum of total number of
A. Protons and neutrons in an atom
B. Protons and electrons in an atom
C. Neutrons and electrons in an atom
D. Protons and neutrons in a nucleus
Answer: Option D
Solution(By Examveda Team)
The mass number of a substance represents the sum of total number of Protons and neutrons in a nucleusThis Question Belongs to Mechanical Engineering >> Power Plant Engineering
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