ELEMENT		A negatively charged particle found outside the nucleus of an atom
MELTINGPOINT		The temperature that a liquid turns to a gas
OXYGEN		The smallest aprt of an element that can exist.
CATALYST		The name given to group seven elements
NEUTRON		This element has an atomic number of one
HALOGENS		These elements are found on the right hand side of the Periodic Table
NOBLEGASES		An uncharged charged particle found in the nucleus of an atom
BOILINGPOINT		The number of protons
CHLORINE		This is the name given to a substance used to speed up chemical reactions.
BROMINE		A group of very unreactive elements
HYDROGEN		Added to drinking water in Scotland to help stop tooth decay
ELECTRON		A disinfectant used in swimming pools
MASSNUMBER		Only made from one type of atom.
FLUORINE		The only liquid non-metal at room temperature
ATOMICNUMBER		The only liquid metal at room temperature
ATOM		The number of protons neutrons
MERCURY		A positively charged particle found in the nucleus of an atom
TRANSITIONMETALS		The name given to the metals found between groups 2 and3
PROTON		The temperature that a solid turns to a liquid
METALS		Humans breathe in this gas during respiration