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16 terms

Earth Science Matter / Atoms Ch. 4 S1

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matter
anything that takes up space and has mass
physical properties
changes that do not effect the composition of the substance
chemical properties
changes to the composition of the substance due to a reaction between substances
examples of physical properties
density, color, hardness, freezing point, boiling point, conduction of electrical currents
element
a substance that cannot be separated or broken down into simpler substances by chemical means
atom
smallest unit of an element that has the chemical properties of that element; each element is made up of one kind of element
protons
subatomic particle in the nucleus that has a positive charge
neutrons
subatomic particle in the nucleus that has a neutral charge (no charge positively or negatively)
electrons
subatomic particle with a negative charge that moves around the nucleus
isotope
one f two or more atoms that have the same number of protons, but different numbers of neutrons.
sublimation
process of a solid turning directly to a gas without going through a liquid phase
deposition
process of a gas turning directly to a solid without going through the liquid phase
condensation
process of a gas turning into a liquid
melting point
process of solids changing to a liquid
freezing point
process of a liquid turning into a solid
evaporation
process of liquid turning into a gas