The expression(s)indicating the number of protons in a nucleus is
A)A.
B)N.
C)Z.
D)Z + N.
E)A - Z.

Name: The expression(s)indicating the number of protons in a nucleus is A)A. B)N. C)Z. D)Z + N. E)A - Z.
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Question

Quizplus · Accepted Answer

The letter Z is commonly used to represent the atomic number, which indicates the number of protons in the nucleus.

Answer: E 
 The difference between the mass number (A) and atomic number (Z) gives the number of neutrons in the nucleus (N). Therefore, A-Z gives the number of protons in the nucleus.

The Expression(s)indicating the Number of Protons in a Nucleus Is