Apuntes
Atomic structure
Contenido del apunte (1)
Página 1
the nuclear model of atoms includes the electrons orbiting in shells around the nucleus, consisting of protons and neutrons.
particle relative charge relative mass
proton +1 1
neutron 0 1
electron -1 0.0005
isotope: an atom which is the same element (same number of protons) but has a different number of neutrons.
standard notation of an atom:
12 C number of protons+neutrons.
6
^
proton number, number of protons in an atom.
if it is not ionic, it will have the same number
of electrons.
Atomic structure