Exam Revision Flashcards
atom
The smallest particle
of an element
atomic number
The number by which
elements are ordered in the
periodic table
boiling point
The temperature at which
a substance change from
liquid to gas
brittle
Easily broken
chemical bond
An attractive force that
holds two atoms together
chemical formula
A symbol that shows the
chemical composition
of a substance
chemical reaction
The re-arrangement of
atoms to form one or more
new substances
chemical symbol
One or two letters used to
represent an element
compound
A substance made up of
two or more types of atom
bonded together
element
A substance made up of
only one type of atom
group
A column in the periodic
table
lattice
A repeating arrangement of
atoms in a solid
Malliable
Able to be hammered
or pressed into shape
without breaking
melting point
The temperature at which
a substance changes from
solid to liquid
metal
A shiny element that
conducts heat and electricity
mixture
A combination of
substances that can be
physically separated
molecule
A group of atoms bonded
together
noble gas
An element that is highly
non-reactive
non-metal
An element that typically
does not conduct heat
or electricity
non-reactive
Tending not to chemically
interact with other
substances
period
A row in the periodic table
periodic table
A grid arrangement of all
known chemical elements
pure substance
A single substance without
anything mixed in
reactive
chemical bond
An attractive force that
holds two atoms together
chemical change
A change in matter
that forms one or more
new substances
combustion
A chemical change where a
substance burns
condensation
A physical change from
a gas to a liquid
deposition
A physical change from
a gas to a solid
digestion
The breakdown of
food by physical and
chemical changes
dissolving
A physical change where a
solid spreads through a liquid
endothermic
reaction
A reaction that absorbs heat
evaporation
A physical change from
a liquid to a gas
exothermic
reaction
A reaction that releases heat
fuel
Any substance that can burn
gas
A substance with no fixed
shape or volume
liquid
A substance with a fixed
volume that flows and
changes shape
melting
A physical change from a
solid to a liquid
matter
Any substance that takes up
space and has mass
mixing
A physical change where
two or more substances
are combined
particle
An atom or molecule
physical change
A change in matter that does
not form new substances
rusting
A chemical change where
iron combines with oxygen
and water
solid
A substance with a fixed
shape and volume
solidification
A physical change from a
liquid to a solid
state of matter
One of the forms that
matter can take, such as
solid, liquid or gas
sublimation
A physical change from a
solid to a gas
