Ch4 Matter and Energy (WIP)

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physical states

the three states held by matter: solid, liquid, gas

solid state

matter has a fixed shape and a fixed volume

liquid state

matter has a variable shape, but fixed volume

gaseous state

matter has a variable shape and volume, but compression is significant

sublimation

solid to gas

melting

solid to liquid

vaporizing

liquid to gas

condenses

gas to liquid

freezing

liquid to solid

deposition

gas to solid

heterogeneous mixture

can be separated into pure substances by physical methods, properties are indefinite and vary

homogeneous mixture

properties are definite constant for a given sample

alloy

a homogeneous mixture of two or more metals

substance

matter that has definite composition and constant properties

compound

predictable properties, but can be broken down into elements by ordinary chemical reactions

element

a substance that cannot be broke down further by a chemical reaction

chemical symbol

the abbreviated name of each element used to identify the element on the periodic table

atom

individual particles that make up an element

semimetal (or metalloid)

an element that typically has properties midway between those of metals and nonmetals

metal

an element that typically is a solid, has bright metallic luster, high density, high melting point, and good conductor of heat and electricity

malleable

property of metal meaning it can be hammered into a thin sheet of foil

ductile

if the metal can be drawn into a fine wire

nonmetal

an element that usually has low density, low melting point, and poor conductor of heat and electrity

atomic number

the number that identifies a particular element

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