The words contained in this file might help you see if this file matches what you are looking for:

...Class ix topic atom and molecule subject chemistry date polyatomic ion a is an composed of two or more atoms examples the hydroxide oh phosphate po are both ions valency combining capacity element known as its used to find out how will combine with another form chemical compound every want become stable do so it may loose gain share electrons i if consists in valence shell then respectively ii outermost electron be has than this hence iv formulae rules valencies charges on must balanced metal non should show name symbols first e g na cl nacl iii consist before writing number indicate ratio radical h formula some simple compounds calcium ca b aluminium sulphate al atomic mass unit total masses neutrons protons group average particle called commonly expressed per international agreement terms unified amu can best defined carbon ground state molecular sum all substance u o constituent particles note above content been absolutely prepared from home...