Question

question 8. the numbers of protons and neutrons in each of four different atoms are shown in the table below.
protons and neutrons in four different atoms

atom	number of protons	number of neutrons
d	9	9
e	9	10
g	10	10

which two atoms represent isotopes of the same element?
a and d
a and g
e and d
e and g

Explanation:

Step1: Recall isotope definition

Isotopes of the same element have the same number of protons but different numbers of neutrons.

Step2: Analyze proton - neutron data

Atom D has 9 protons and 9 neutrons, and atom E has 9 protons and 10 neutrons. They have the same number of protons and different numbers of neutrons.

Answer:

C. E and D