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Matter and Chemistry

TermDefinition
element a substance that can't be broken down into simpler substances
compound two or more different elements joined by a chemical bond
mixture a combination of two or more substances that are not chemically combined
atom the smallest unit of an element that maintains the properties of that element (basic unit of matter)
proton subatomic particle with a positive charge, located in the nucleus of an atom
neutron subatomic particle with no charge (neutral), located in the nucleus of an atom
electron subatomic particle with a negative charge, located outside the nucleus
physical property a characteristic of a substance (color, density, state of matter)
chemical property a characteristic of a substance that describes its ability to participate in chemical reactions (flammable, reactive)
physical change change of matter from one form to another without a change in properties (bend, melt, crush)
chemical change a substance changes into a new substance with different properties (wood burns to produce ash and gases)
atomic number number of protons in one atom of an element
mass number combined number of protons and neutrons in one atom of an element
metal an element that is shiny and conducts heat and electricity well
metalloid an element with properties of both metals and nonmetals (often used as semiconductors)
nonmetal an element that conducts heat and electricity poorly
group vertical column on the Periodic Table, there are 18
period horizontal row on the Periodic Table, there are 7
chemical symbol one or two letter abbreviation for the name of an element
Created by: lfurrow13
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