science
Grade-9
Easy
Question
How many neutrons are there in copper?
- 35.5
- 34
- 29
- 34.5
Hint:
The number of neutrons in a copper atom is 34.
The correct answer is: 34
- The mass number of copper is 63.
- The number of electrons in a copper atom is 29.
- The protons and neutrons are bound in the nucleus which is 29 and 34 in number respectively.
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