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

M

Z

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M

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Z

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M

Z

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Solution

The correct option is A $M$ - $Z$
No. of neutrons $=$ Total no. of nucleons $-$ no. of protons
$= M - Z$

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

The correct option is A M - ZNo. of neutrons = Total no. of nucleons − no. of protons =M−Z

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

The correct option is A $M$ - $Z$
No. of neutrons $=$ Total no. of nucleons $-$ no. of protons
$= M - Z$