click below
click below
Normal Size Small Size show me how
Elements
elements,compounds and mixtures
Term | Definition |
---|---|
Element | substance that cannot be split up into simpler substances by chemical means |
H | hydrogen |
B | boron |
C | carbon |
N | nitrogen |
O | oxygen |
F | fluorine |
P | phosphorus |
S | sulfur |
HE | helium |
LI | lithium |
BE | beryllium |
NE | neon |
MG | magnesium |
AL | aluminium |
SI | silicon |
CL | chlorine |
AR | argon |
CA | calcium |
MN | manganese |
ZN | zinc |
Compound | substance made of 2 or more different elements combined together chemically |
mixture | consists of 2 or more different substances mingled with each other but not chemically combined |
air | is a mixture of different gases |
sea water | mixture of salt and different substances |
crude oil | most valuable substance ever discovered |
earth | mixture of stones,sand,clay,water etc. |
petrol | mixture of different compounds of hydrogen and carbon |
differences between mixtures and compounds | 1) amount of substances in the mixture can vary 2) little energy changes occur when a mixture is made 3)substances in the mixture can be easily separated |