First Chemistry Test

34 terms by merkertffms 

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chemistry

study of matter and its reactions

matter

anything that has mass and takes up space

properties

characteristics used to describe a substance

gas

phase of matter that has no definite shape or volume

liquid

phase of matter with a definate volume, but no definite shape

phase

form of matter

solid

phase of matter with a definite shape and volume

condensation

change from gas to a liquid

evaporation

change from a liquid to a gas at the surface of the liquid

freezing

change from a liquid to a solid

melting

change from a solid to a liquid

chemical change

change that produces new substances

physical change

change that does not produce new substances

elements

simple substances that cannot be broken down into simpler substances

chemical symbols

shorthand way of writing the names of the elements

group

vertical column of elements in the periodic table

period

horizontal row of elements in the periodic table

periodic

repeating pattern

atom

smallest part of an element that can be identified as that element

electron

negatively charged particle

neutron

neutral particle

nucleus

center, or core, of an atom

proton

positively charged particle

atomic number

number of protons in the nucleus of an atom

atomic mass

total mass of the protons and neutrons in an atom, measured in atomic mass units

energy level

place in an atom where an electron is most likely to be found

molecule

smallest part of a substance that has all the properties of the substance

substance

any element or compound

subscript

number written to the lower right of a chemical symbol

L shell

can hold up to 8 electrons

M shell

can hold up to 18 electrons

balance

intrument used to measure mass

graduated cylinder

instrument used to measure volume of a liquid

meniscus

ability of liquid to cling to the side of container. Proper measurement is at the bottom of the curve

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