chemical
what are chemical symbols
each chemical symbol represents a different element surrounding us
how do we write them
always start with a capital letter then a lower if needed
what is an atom
atom is the smallest part of the of a substance that can exist
what is an element
substance made up of one type of atom
what is a compound
two or more type of elements chemically joined together
what does a chemical reaction arrrow mean
the arrow tells a chemical reaction has taken place
conservation of mass
mass cannot be created or destroyed