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Average and Relative Atomic Mass

An atom has 1...

Question

An atom has 16 neutrons in its nucleus. The atomic no. of the element is 15 and the mass number of the element is__________.

A

15

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B

16

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C

31

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D

None of these

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Solution

The correct option is C 31
An atom has 16 neutrons in its nucleus. The atomic no. of the element is 15 and the mass number of the element is 31.
Mass number $=$ Number of neutrons $+$ atomic number
Mass number $=$ 16 $+$ 15
Mass number $= 31$

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