First slide

Hydrogen

Question

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

Easy

A

1,0 and 2
B

0,2 and I
C

0, I and 2
D

2, I and 0

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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