RRB Group-D Model Paper 11 with answers for online practice

Question : 31 of 100

Marks: +1, -0

Which of the following notation represents an isotope?

Solution:

Concept:

Isotopes are defined as the atoms of the same element, having the same atomic number but different mass numbers.

For example, Hydrogen

({}↖{1} H)

has three naturally occurring isotopes

{}↖{1}H, {}↖{2}H

, and

↖{ 3}H

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