•atomic mass= is the calculated average of the atoms naturally occurring isotopes according to their percentage •Unit for atomic number is amu.`1 amu= 1.660539*10^-24 g•Chemical compound- pure substance formed when 2 or more elements combine changing the chemical properties into something new via a chemical reaction.•mixture- no chemical reaction occurs, substances are just blended. •Electrons-in a reaction, it is them that form chemical bonds.•Covalent bonds-usually between 2 non metals. •Ionic bond-usually between metal and non-metal is a transfer of electrons, not a sharing of electrons like in covalent bonds.•Polyatomic ions: charged covalently bonded molecules.•Acid-provides a H+ (proton) when dissolved in water•Base-substance that provides an OH- (hydroxide ion) when dissolved in water.•Binary compounds-compounds made up only of 2 elements.•Oxoanions- an atom of a given element is combined with different numbers of oxygen atoms.
This is the end of the preview.
access the rest of the document.