Question

Which of the following represents a pair of isotopes?
A. Ca+2, Be+2
B. 12C, 14C
C. Fe+2, Fe+3
D. 7N, 8O

Answer 1

B.
Isotopes is an atom has same number of electrons and protons but different number of neutron.

Answer 2

We have that

the Carbon isotopes represents a pair of isotopes

• 12C, 14C

Option B

From the question we are told

Which of the following represents a pair of isotopes?

• A. Ca+2, Be+2
• B. 12C, 14C
• C. Fe+2, Fe+3
• D. 7N, 8O

Generally

Isotopes

This is defined as variant forms of an element with variant atomic mass but same proton number

Therefore

the Carbon isotopes represents a pair of isotopes

• 12C, 14C

For more information on this visit

https://brainly.com/question/17756498