"Isotopes" are atoms with the same number of ________ but different number of ________.
A. electrons, protons
B. neutrons, protons
C. protons, electrons
D. protons, neutrons
Answer:D
"Isotopes" are atoms with the same number of ________ but different number of ________.
A. electrons, protons B. neutrons, protons C. protons, electrons D. protons, neutrons