How can we help?

You can also find more resources in our Help Center.

43 terms

additional terms

This is the combined set for Units 12, 14,15,16
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
mass number
number of protons and neutrons in the nucleus of an atom
energy level
place in an atom where an electron is most likely to be found
compound
substance made up of two or more elements chemically combined
molecule
smallest part of a substance that has all the properties of the substance
substance
any element or compound
mixture
two or more substances that have been mixed together but not chemically combined
chemical formula
way of writing the name of a compound using chemical symbols
subscript
number written to the lower right of a chemical symbol
K shell
can hold up to 2 electrons
L shell
can hold up to 8 electrons
M shell
can hold up to 18 electrons
kinetic
energy of motion
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
product
a chemical substance formed as a result of a chemical reaction
reactant
a chemical substance that is present at the start of a chemical reaction
surface tension
like an elastic net around the surface of the water that holds the molecules together.