Compounds Flashcards
1
Q
Compound
A
a compound is a pure substance made up of two or more different elements that are chemically joined together
2
Q
mixture
A
a mixture made from different substances that aren’t chemically joined together
3
Q
examples of compounds
A
water, carbon dioxide, iron sulfide
4
Q
examples of mixtures
A
air, sea water (Water and salt ), mud (Dirt and water)
5
Q
properties of compound
A
they are different from the properties of the elements they contain. Example: hydrogen and oxygen are both gases, but water is a liquid
6
Q
how do you separate the elements in a compound
A
by using another chemical reaction
7
Q
differences between compounds and mixtures:
A
- the elements in a compound are chemically joined while the substances in a mixture aren’t
- the elements in a mixture keep their properties, while a compound has completely new properties
- mixtures can be separated by physical methods while compounds can be separated by chemical reactions
8
Q
water is made up of
A
hydrogen and oxygen
9
Q
magnesium oxide is made up of
A
magnesium and oxygen
