what are atoms made up of
symbol of proton
position of proton
relative charge of proton
elative mass of proton
symbol of neutron
position of neutron
relative charge of neutron
relative mass of neutron
symbol of electrons
position of electrons
relative charge of electrons
relative mass of electrons
why is the atom electrically neutral
define proton number
define nucleon number
what is another name for proton number
what is another name for nucleon number
define isotopes
do isotopes have similar or different chemical properties and what does it depend on
do isotopes have similar or different physical properties and what does it depend on