posted by timmy123 on .
Atom A- 6 protons, 6 electrons, 7 neutrons
Atom D- 6 protons, 6 electrons, 8 neutrons
Atom X- 7 protons, 7 electrons, 8 neutrons
Atom Z- 8 protons, 8 electrons, 9 neutrons
Which two atoms are isotopes of the same element?
a. A and D
b. A and Z
c. X and D
d. X and Z
How am I supposed to figure this out?
An isotope has the same number of protons as the original element, but different number of neutrons.
I think the answer is A because atomA and atomD have the same number of protons and a different number of neutrons.
Moises is correct. The answer is a. A and D are isotopes.