Question

The table below shows the atomic mass of four stable calcium
(Ca) isotopes.
Isotope Atomic Mass
Ca-40
40
Ca-42
Ca-43
43
Ca-44
44
What characteristic is different in each isotope?
A
the position in the periodic table of the elements
B
the net charge of the nucleus
©
the mass of the protons in the nucleus
D
the number of neutrons in the nucleus

Answer 1

isotopes have the same number of electrons and protons just the number of neutrons that change