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ch. 17 vocab

carroll vocab. 17

vocab worddefinition
atoms the building blocks of matter
element a material composed of one type of atom
brownian motion perpetual jiggling of particles that are just large enough to be seen
molecule smallest particle of a substance consisting of two more atoms that bond together by sharing electrons
compound substance made of atoms of different elements combined in a fixed proportions
chemical formula chemical formula of compound tells the proportion of each kind of atom in
nucleus all of an atoms mass is packed into the dense central region-nucleus
nuleons building blocks of the nucleus
neutrons nucleons in an electronically neutral state
protons nucleons in an electronically charged state
isotopes atoms of the same element having different numbers of neutrons
atomic number the # of protons in the nucleus
ion atom with a net charge
shell model of the atom electrons are pictured as orbiting in spherical shells around the nucleus.
periodic table chart that lists atoms by heir atomic number and by their electron arrangements
plasma a phase where matter consists of positive ions and free electrons.
Created by: ellen 401