relative atomic mass: relative mass of an atom of an element compared to 1/12th of an atom of carbon-12
relative molecular mass: average mass of a molecule when measure on a scale
relative isotopic mass: the mass of an isotope compares to 1/12th of a carbon-12 atom
what is the mass of an electron?
1/1840
what letter represents mass number?
A
what letter represents proton number?
Z
what are isotopes?
atoms with the same number of protons but different number or neutrons
what are properties of isotopes?
they have the same chemical properties because they have the same electron configuration but they may have slightly different physical properties because they have different masses
relative atomic mass:
relative mass of an atom of an element compared to 1/12th of an atom of carbon-12
