SSC Steno Grade C and D 11 Sep 2017 Shift 1 Paper

Question : 79 of 200

Marks: +1, -0

How many isotopes of Hydrogen element are there?

Solution:

(2) Hydrogen (1H) has three naturally occurring isotopes, sometimes denoted

^1H, ^2H,

and

^3H.

The

^2H

(or hydrogen-2) isotope is usually called deuterium, while the

^3H

(or hydrogen-3) isotope is usually called tritium.
The ordinary isotope of hydrogen, with no neutrons, is sometimes called “protium”.

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