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Science: Chemistry Facts

A positively charged ion is called a ____. atom
A group of atoms held together by covalent bonds is a ____. catalyst
Any atom or molecule that has a charge is an ____. cation
A ____ is a subatomic particle with no electric charge. compound
A ____ contains atoms of at least two different elements. ion
A ____ increases the rate of a chemical reaction. molecule
A ____ is subatomic particle with a positive charge. neutron
The basic unit of an element is an ____. proton