Compared with ³¹P, the Radioactive Isotope ³²P Has

Question

Compared with ³¹P, the radioactive isotope ³²P has
A) a different atomic number.
B) a different charge.
C) one more proton.
D) one more electron.
E) one more neutron.

Accepted Answer

³²P has one more neutron than ³¹P. This is because isotopes are defined by their atomic number (number of protons) but can differ in the number of neutrons they have in their nucleus.