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science reviw unit 3

TermDefinition
element Substance that cannot be separated
Compounds Substance that contains two or more elements that are chemically combined
Mixtures A material made up of two or more substances that are different
Molecules The smallest thing is a substance can be broken up into
Atoms The basic particle of chemical elements
protons Subatomic particles that are found in the nucleus of an atoms
neutrons a subatomic particle that has a positive charge
electron a subatomic particle with a negative charge
Lewis dot structure arrangement of molecules
chemical symbols abbreviation of a chemical
atomic number the number of protons in the nucleus
period investigation of a natural phenomenon
group group of elements
noble gasses any of the gaseous elements
halogens can be combined to make salt
alkali metals group of metals
ions a molecule with a net electric charge
ionic bonds to electrons attracted to each other
covalent boonds bond between sharing bonds
Created by: user-1903962
 

 



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