atomic structure 3.2
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what’s the relative mass and charge of a proton?
1mass +1 charge
what the relative mass and charge of a neutron?
1 mass 0 charge
what’s the relative mass and charge of electrons?
0.0005 mass -1 charge
what’s the atomic number?
number of protons
what’s the mass number?
total number of protons and neutrons
what’s the top number tell us?
mass number
what’s the bottom number?
atomic number
what are isotopes?
atoms with same number of protons but different numbers of neutrons
how do you work out the relative atomic mass?
(% abundance x mass) + (% abundance x mass)
what does a row tell you?
period - number of occupied shells
what does a column tell you?
group - number of electrons in the outer shell
what are the shells called?
energy levels