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Chemistry vocab.

2020 8th grade science

TermDefinition
Atom the smallest particle of an element, made of electrons, protons, and neutrons.
Nucleus the tiny, very dense, positively-charged region in the center of an atom; made up of protons and neutrons
Electron Cloud the area surrounding the nucleus of an atom where the electrons are found
Electrical Charge a property of matter; electrons are negatively charger; protons are positively charged; the numbers of protons and electrons in a material determine the charge of the material
Proton a positively-charged subatomic particle of the nucleus of an atom that contributes to the mass of the atom
Neutrons a subatomic particle of the nucleus of an atom that is without charge that contributes to the mass of an atom
Electron a negatively-charged subatomic particle that orbits the atomic nucleus
Subatomic Particles particles that are smaller than the atom
ELement a pure substance that cannot be separated into simpler substances by physical or chemical means
Atomic Number the number of protons in the nucleus of a single atom
Chemical Symbol a one or two letter notation used to represent an atom of a particular element
Atomic Mass the mass of an atom, approximately equal to the number of protons and neutrons in the atom
Created by: 716920
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