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Atomic Number

Hydrogen has ...

Question

Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (x), (y) and (z), the sum of (x), (y) and (z) is :

A

4

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B

3

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C

2

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D

1

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Solution

The correct option is B 3
Hydrogen has three isotopes:

Isotopes Number of neutrons

Protium $(_{1}^{1} H)$ 0

Deutrium $(_{1}^{2} H)$ 1

Tritium $(_{1}^{3} H)$ 2

The sum is 3

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Q. Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (x), (y) and (z), the sum of (x), (y) and (z) is:

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