Question

Given the following table, which statement is true about atoms A and B?

A. A and B are isotopes of the same element.
B. A and B are isotopes of different elements.
C. The two atoms have the same mass.
D. Only atom B is an isotope.

Answer 1

A
As mass number= no of protons+neutrons
Isotopes= two atoms having same atomic number (=number of protons) but different masses