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chem vocab unit 3

anion a negatively charged ion
homogeneous type of mixture which is the same throughout and individual particles cannot be identified
compound a substance composed of two or more elements chemically combined
solution another term used for homogeneous mixture
potential energy of position
Alkali Metals name of the most reactive metallic family
Heterogeneous a type of mixture which is unevenly distributed and individual particles can be identified
boiling point the temperature at which a liquid changes into a gas
cation name of a positively charged ion
ion an atom which has either gained or lost electrons
phaser common weapon used on Star Trek
mass the amount of matter in a substance
temperature this remains constant during a phase change
mass number the sum of the # of neutrons plus the # of protons
accurate a value which is exact, or right on the correct value
Deci metric prefix meaning 10
Precise when several values are close together, but not necessarily exact
kinetic the energy of motion
melting point the temperature at which a solid changes to a liquid
halogens chemical family with 7 valence electrons
element a pure substance made of only one type of atom
solution Mixture that shows the tyndall effect and has particles large enough to reflect light but too small to be filtered.
Bohr Solar system model of the atom was proposed by him.
charge can be calculated by subtracting electrons from protons
mixture a substance composed of two or more elements or compounds not chemically combined
physical change when the shape or phase of a substance changes, yet it could still be changed back to the original substance
Created by: skhan765



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