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8th Grade Science

Chapter 2 Vocabulary - Earth Chemistry

QuestionAnswer
matter anything that has mass and takesup space
element substance that contains only one type of atom example: oxygen, iron
atom tiny building blocks of matter, made up of protons, neutrons, and electrons
nucleus the tiny dense core of an atom; made of protons and neutrons
physical properties a characteristic of matter that can be observed or measured without changing the identity of the matter
chemical property characteristic of matter that can be observed only as it changes to a new type of of matter
atomic number the number of protons in an aton
atomic mass the number of protons plus the number of neutrons in an atom
compound matter that is made of two or more elements and has properties different from each of these elements
molecule two or more atoms that are held together
mixture two or more substances that are not chemically combined
solution a mixture that is evenly mixed throughout
solid has a definite shape and takes up a definite volume; particles are in fixed positions
liquid takes up a definite volume but changes shape to fit its container; particles are not in a fixed position
gas spreads out and fills its container; particles move freely and independently
metal shiny, coducts electricity, ductile, malleable
nonmetal does not have the properties of a metal
structure how the parts of something are arranged
composition what something is made of
Created by: HOMSSeminar
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