Card Set Information
what is a metal?
solid at room temperature,
except copper= redish
shiny, malluable good conductors of heat and elecricity, heat and electricity travel through metals.
what is a puresubstance?
has one type of matter and constant properties
what is electrolosis of water?
electrical energy used to break water molecules apart
to make hydrogen and oxygen
elecrolysis happens when and electrical current flows through water
what are 5 clues a chemical change has taken place.
1) bubbles of a new gas are formed
2) heat or light is given off
3) new color appears
4) a solid material forms into a liquid
5) the change can not be reversed
what is a neutron?
what is an electron?
what is a proton?
what are halogens?
what are nobel gases
what are alkaline earth metals?
very high reactive metals
what is a chemical change
a new substance isformed by a chemical reaction
atoms dont changes- changes the way atoms are linked up
what is a phisical change?
change of state ( icecube-water-gas)
change of shape (paper tear into small peices)
doesn't change the way atoms are linked up
how to test for hydrogen
insert a glowing splint into a test tube of gasif it will make a pop sound then it is hydrogen
how to test for carbon dioxide
mix the gas with clear colourless limewater
if the water will turn cloudy
then it is carbon dioxide
how to test for oxygen
insert a glowing splint in a test tube of gas
if it burst into flames then is is oxygen
what is a mechanical mixture
type of mixture
2 parts are visible
exampl... water nd oil
what is solution?
type of mixture
some parts that make this are invisible
only see on part
what is a mixture?
contains 2 types of matter
keep of there own properties
examples...sand and salt
what is a compound?
type of pure substance
made up of 2 or more diffrent atoms
can be broken down to form new substances
what is an element?
type of puresubstance
one kind of atom
cant be broken down
what are alkali metals?
high reactive metals
what is a non-metal?
doesnt have the properties of metals.