8. What is the mass number of an atom that has 12 neutrons and 11 protons? A 11 B 24 C 23 D 12

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asked Dec 18, 2021 90.6k views

2 votes

8. What is the mass number of an atom that has 12 neutrons and 11 protons?

A 11
B 24
C 23
D 12

Physics
middle-school

Firman asked

by Firman

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2 Answers

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C 23 is the mass number

Fahad answered Dec 20, 2021

by Fahad

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3 votes

Answer:

C. 23

Step-by-step explanation:

The mass is made up by the proton and nuetrons,

12+11=23 your atomic mass

Evalsyrelec answered Dec 24, 2021

by Evalsyrelec

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