Chemical change

Vocabulary# 3

a chemicl ombination of two or more element is COMPOUND

a link that atom or atomic-sized particle can form is CHEMICAL BOND

the using of letters and number to show how much of each element is in a substance is CHEMICAL FORMULA

is an  electrically charged particle with unequal number of protons ad electrons is ION

a goup of bonded  atoms that act like an single partile is called MOLECULE

describing how a substance change chemically with other substance is called CHMICAL PROPERTY

chemical reations that gi off heat are said to be EXOTHERMIC

chemical reaction that absorb heat is ENDOTHERMIC