Question

The atomic mass of an element is the weighted average mass of the isotopes of that element. (True or False)

Atoms with the same number of protons but different number of neutrons are called what?(Choices:_isotopes, ions , iosomers)
How many neutrons are in potassium-40? The chemical symbol for potassium is K.
(choices:_19,20,21,40))

Answer 1

Isotope, and sorry I do not know the answer to the second one potassium (k) generally has 20 neutrons. Hope this helps.