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SHMS7 Ch 3 sec 2

vocabulary

QuestionAnswer
Element A pure substance that cannot be broken down into other substances by chemical or physical means.
Atomic Mass The average mass of all the isotopes of an element.
Atomic Number The number of protons in the nucleus of an atom.
Periodic Table A chart of the elements showing the repeating pattern of their properties
Chemical Symbol A one- or two-letter representation of an element.
Period A horizontal row of elements in the periodic table.
Group Elements in the same vertical column of the periodic table; also called family
Chemical Formula A formula that gives the elements in a compound and the ratio of atoms.
Compound A pure substance made of two or more elements chemically combined.
Molecule A particle made of two or more atoms bonded together.
Created by: sciencegirl
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