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Chemistry Unit Vocab

Chemistry Unit Test - Vocab

QuestionAnswer
the temperature at which a liquid turns into a gas boiling point
the electron(s) on the outermost energy level valence electron
the temperature at which a solid turns into a liquid melting point
a column of elements in the period table of elements group or family
when a liquid turns into a gas vaporization
a row of elements in the periodic table of elements period
a well-mixed mixture containing at lease one liquid solution
the orbital paths of electrons around the nucleus of an atom energy level
two or more substances that are mixed together but not chemically combined mixture
the average mass of one atom of an element atomic mass
a substance made of only one type of matter and having definite properties pure substance
one or two letters representing an element atomic symbol
a substance that cannot be broken down into other substances by chemical or physical means element
the number of protons in the nucleus of an atom atomic number
a change in a substance that does NOT change its identity physical change
a tiny negatively charged particle that moves around the nucleus of an atom electron
a change in which one or more substances combine or break apart to form new substances chemical change
a small particle in the nucleus of the atom with no electrical charge neutron
the smallest particle of an element atoms
a positively charged particle in an atom proton
two or more atoms chemically combined molecules
the resistance of liquid to flowing viscosity
the force that holds two atoms together chemical bond
The amount of matter in an object mass
The measure of the pull of gravity on an object weight
how tightly packed molecules are in an object; found by dividing the mass of an object by its volume density
the amount of space an object occupies or takes up volume
the curved surface of a liquid in a graduated cylinder meniscus
a glass or plastic container with markings used to measure the volume of liquids graduated cylinder
when one substance moves and takes the place of another displacement
Created by: gdustin
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