Mixtures Flashcards
1
Q
How many types of atoms are elements made up of?
A
Elements are made up of one type of atom
2
Q
What are compounds made of?
A
Compounds are made up of two or more chemically bonded atoms.
eg: Sodium Chloride
3
Q
What are diatomic molecules?
A
They are elements that always come in pairs.
eg: H2
N2
O2
4
Q
What are mixtures?
A
Mixtures contain elements or compounds that are NOT chemically bonded together.
Separated using physical processes.
5
Q
What are pure substances?
A
- One type of particle
- For es between particles are EQUAL
- Require some amount of energy to overcome
- Will melt at the same temperature
6
Q
What are impure substances?
A
- Different particles
- Different forces between particles
- Require different amounts of energy to overcome
- Will melt over a range of temperatures
7
Q
What is suspension?
A
A mixture that will separate when left to stand.
eg: Sand and Water
8
Q
What is a colloid?
A
A mixture where substances DON’T separate when left to stand
9
Q
What is a:
- solid in liquid
- liquid in solid
A
- sol
- gel
10
Q
What is a:
- solid in gas
- gas in solid
A
- aerosol
- solid foam
11
Q
What is :
- liquid in liquid
- liquid in gas
- gas in liquid
A
- emulsion
- aerosol
- foam
