Q.

How many neutrons are present in protium, deuterium and tritium respectively?

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a

1,0 and 2

b

0, I and 2

c

2, I and 0

d

0,2 and I

answer is C.

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Detailed Solution

Ordinary hydrogen, protium, has no neutrons, deuterium (also known as heavy hydrogen) has one and tritium has two neutrons in the nucleus.

Number of neutrons = Mass number - atomic number

 

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