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Chemistry Vocabulary
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a combination of two or more substances that are not chemically combined
mixture
compound
a substance made up of atoms of two or more different elements joined by chemical bonds
coefficient
number in front of a chemical formula indicates how many molecules and atoms
a number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound
subscript
color change, light created, temperature, bubbling, precipitate formed
evidence for chemical change
a change in matter that creates one or more new substances
chemical change
a change in matter that does not change its identity
physical change
number of protons and neutrons
atomic mass
a combination of chemical symbols and numbers to represent a substance
chemical formula
a one or two letter representation of an element
chemical symbol
the number of protons in the nucleus of an atom
atomic number
negatively charged particle that orbits the nucleus of an atom= atomic number
electron
particle of an atoms nucleus can be found by subtracting atomic number from atomic mass
neutron
positively charged particle of an atoms nucleus= atomic number
proton
a group of atoms bonded together
molecule
a pure substance made of only one kind of atom
element
smallest particle of an element
atom
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