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Chemistry Quiz

A positively charged ion is called a ____. atom
The basic unit of an element is an ____. catalyst
A ____ increases the rate of a chemical reaction. cation
An ____ is subatomic particle with a negative charge. compound
An ____ consists of only one type of atom. electron
Any atom or molecule that has a charge is an ____. element
Diamond is the hardest naturally occurring ____ on Earth. ion
A ____ contains atoms of at least two different elements. mineral