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WAEC Physics 2019 Paper

Question : 43

Total: 49

Solution:

Concept:

Number of neutrons = Nucleon number − Proton number.

Explanation:

The nucleon number (mass number) is the total number of protons and neutrons in the nucleus.

Here, nucleon number =

238

and proton number =

92

So, neutrons =

238 - 92 = 146

This corresponds to option D.

Answer:

146

neutrons

Option D.

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