Relative, atomic, and mass number Flashcards
1
Q
A
2
Q
Mass number
A
the sum of the mass of protons and neutrons in the nucleus
3
Q
relative atomic mass
A
the average number of isotopes, as they occur naturally, taking their abundance into account, and expressed on a scale where a carbon -12 atom has a mass of 12 units
4
Q
isotope
A
atoms of the same element with different mass numbers due to different amounts of neutrons
