Question

the atomic number and mass number for a specimen are Z and A respectively. The number of neutron in the atom will be

Answer 1

the answer is atomic mass -atomic Number (A-Z)

Answer 2

Answer: Number of neutrons is given by A - Z

Explanation:

Atomic number of an element is given by number of protons present in the nucleus.

Mass number of an element is given as sum of number of protons and neutrons in the nucleus.

Therefore, number of neutrons in an element is given by difference of Mass number and Atomic number.

Number of neutrons = A - Z

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