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Atomic Number and Mass Number

The atomic nu...

Question

The atomic number and the mass number of an element A are 14 and 28 respectively. The number of neutrons are:

A

14

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B

42

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C

28

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D

12

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Solution

The correct option is A
14

Number of neutrons = Mass number - Atomic number

= 28 - 14 = 14

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