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Atomic number of a nucleus is Z and atom...

Atomic number of a nucleus is `Z` and atomic mass is `M`. The number of neutron is.

A

`M - Z`

B

M

C

Z

D

`M + Z`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `N = M - Z =` Total no. Of nucleons - no. of protons.
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  • The atomic number of Potassium is 19 and its mass number is 39. The number of neutrons its atom is

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