What is the mass number of an atom which is made up of 38 protons, 52 neutrons and 38 electrons?
A) 38
B) 52
C) 90
D) 128

Name: What is the mass number of an atom which is made up of 38 protons, 52 neutrons and 38 electrons? A) 38 B) 52 C) 90 D) 128
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Question

Quizplus · Accepted Answer

The mass number of an atom is the sum of its protons and neutrons. Therefore, the mass number of the given atom would be:

38 protons + 52 neutrons = 90

Hence, the correct answer is C (90).

What Is the Mass Number of an Atom Which Is