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Chemistry Vocabulary

SOL 6.4

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 or electrons in an element.
Atomic Symbol An 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 property of that element
Nucleus The central core of an atom that contains the protons and neutrons.
Proton Small, positively charged particles in the nucleus of an atom.
Neutron Small, uncharged particles 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: minions4ever16