Question

Which pair below describes isotopes of the same element?

A) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6 neutrons
B) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons
C) an atom with 8 protons and 8 neutrons - an atom with 7 protons and 8 neutrons
D) an atom with 7 protons and 6 neutrons - an atom with 6 protons and 6 neutrons
8)

Answer 1

Answer: B

Step-by-step explanation:

For exhibit isotopy, atoms of the element must have the same proton number (atomic number) but different mass number.

In Option B

The two atoms have same atomic number (6) but different mass number (12 and 13 respectively).

Mass num = proton number + Neutron number

Unlike the other options.