| A | B |
|---|
| elements | compounds have properties unlike those of their _______________________ |
| subscript | a ___________________ number wriiten after a symbol tells how many atoms of that element are in a unit of the compound |
| chemical formula | the __________________ for any compound tells what elements it contains and the ratio of the atoms of those elements |
| chemically stable | an atom is ______________________ if its outer energy level is completely filled with electrons |
| eight | for the atoms of most elements the outer energy level is filled when it contains ___________________ electrons |
| chemical bond | a ___________________ is a force that forces together the atoms in a substance |
| ions | atoms that have a charge are called ____________________ |
| ionic bond | a ___________________________ is the force of attraction between the opposite charges of the ions in a ionic compound |
| molecules | neutral particles formed as a result of electron sharing are called ____________________ |
| covalent bond | the attraction that forms between atoms when they share electrons is known as a _____________________ |
| polar molecule | a _________________________ is one that has a positive end and a negative end |
| toxic | _________________ compounds are poisonous |
| corrosive | a ___________________ compound is useful for unclogging drains and cleaning ovens and can be found in car batteries |
| flammable | compounds that are said to burn easily |
| oxidation number | a positive or negative neumber assigned to an element to show its combining ability in a compound |
| binary compound | compound composed of two elements |
| aluminum sulfide | name of Al(2)S(3) |
| potassium bromide | name of KBr |
| hydrate | compound that has water chemically attached |
| anhydrous | means without water |
