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ch 17 vocab

kramer physics ch 17

atom the smallest particle of an element that can be identified with that element. has protons and neutrons in a nucleus surrounded by electrons
element substance made of only one kind of atom
brownian motion the perpetual random movement of microscopic particles suspenced in a fluid
moleclue the smallest particle of a substance consisting of two or more atoms of the same or different elements bonded together
compound a chemical substance made of atoms of two or more different elements combined in a fixed proportion
chemical formula a description that uses number and symbols of elements to describe the proportions of elements in a compound or reaction
nucleus the positively charged center of an atom , which contains protons and neutrons and almost has all the mass of the entire atom
nucleons the principle building block of the nucleus; a proton or neutron
neutrons electrically charged particles that are of the two kinds of particles found in the necleus of an atom
protons a postively charged particle that is one of the two kinds of particles found in the nucleus of an atom
isotope a form of an element having a particular number of neutrons in the nuclei of its atoms
atomic number total number of protons in the nucleus of an atom.
ion an atom with an electrical charge , which is due to the loss or gain of electrons
shell of the modle atom electrons that are pictured as orbiting in spherical shells around the neucleus
peridoic table a chart that lists atoms by their atomic number and electron arrangements
plasma a fourth phase of matter , in addition to soid liquid and gas.
Created by: hkramer