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Chemistry

TermDefinition
matter anything that has mass and occupies space
element a _substance composed of a single kind of atom that cannot be broken down into other substances by chemical or physical means
periodic table an organized table of all the known elements
atomic number the number of protons of all the known or electrons in an element
.atomic symbol abbreviation for the element name
atomic mass the mass of protons + neutrons (also called atomic weight or mass number)
compound a substance in which two or more elements are chemically joined in a set ratio
mixture two or more substances that are mixed together but not chemically combined
atom the smallest unit of an element that retains (or keeps) the properties of that element
nucleus the central core of an atom that contains the protons and neutrons
proton small, positively charged particle in the nucleus of an atom
neutron small, uncharged particle in the nucleus of an atom
electron a tiny, negatively charged, high energy particle that moves___ in the space around the nucleus of an atom
electron shells fixed orbits or paths that electrons travel in around the nucleus
molecule two_____ or ___more____ atoms that are ____bonded_________together
chemical bond the force that holds two or more atoms together
Created by: 3130872
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