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34 terms

First Chemistry Test

STUDY
PLAY
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