topic 1a - atoms, elements, compounds and mixtures (3. isotopes)

Question 1

what are isotopes

Answer 1

different forms of the same element, which have the same number of protons but a different number of neutrons. same atomic number different mass number.

Question 2

relative atomic mass formula

Answer 2

relative atomic mass (Ar) = sum of (isotope abundance x isotope mass number)/ sum of abundances of all the isotopes