C2 - Elements, compounds & isotopes.
Elements consist of one type of atom only
Compounds are chemically bonded
* Compounds are formed when 2 or more elements chemically re-act together *
Isotopes are the same expect for an extra neutron or 2
Isotopes are different atomic forms for the same element, which have the same number of protons, but different number of neutrons.
Isotopes have the same atomic number but different mass numbers.
Popular isotopes - Carbon-12 and Carbon-14
Number of electrons decide the chemistry of the element
RAM (Relative atomic mass) - Average mass of all the atoms in element.
Chlorine has two isotopes.