atomic structure Flashcards
what is the relative mass of a proton?
1
what is the relative mass of a neutron?
1
what is the relative mass of an electron?
0.0005
what is the relative charge of a proton?
+1
what is the relative charge of a neutron?
0
what is the relative charge of an electron?
-1
where are protons and neutrons found in an atom?
nucleus
where are electrons found in an atom?
in energy levels (shells)
what is the atomic number?
number of protons
what is the mass number?
total number of protons and neutrons
how do you work out the number of electrons?
same as protons
define ‘isotopes’
atoms with the same number of protons, but a different number of neutrons
they have the same atomic number, but different mass numbers
what is the relative atomic mass (RAM)?
average mass of an atom
how do you calculate the RAM of an atom?
%abundance x mass number / 100
what is an electron configuration?
shows how electrons are arranged