Bonding

Question 1

matter split into

Answer 1

matter
pure substances:
•elements
•compounds
Mixtures:
•homogeneous - even
•heterogeneous - uneven

Question 2

infomation on Pure substances

Answer 2

• Have a constant composition
• physical and chemical properties are fixed
•Can be seperated by chemical means not physical means

Question 3

infomation on mixtures

Answer 3

•Two or more pure substances combined together
•Physical and chemical properties vary by composition
•Seperated by physical means

Question 4

physical properties

Answer 4

Can be determined without changing the chemical composition of the substance eg melting and boiling points, electrical conductivity, density, hardness, etc

Question 5

Chemical properties

Answer 5

Can be determined by changing the substance into a new substance eg flammability, reactivity with acid, reactivity with oxygen, inertness, etc

Question 6

Name the 6 ways to seperate mixtures

Answer 6

1. Sieving
2. Filtration
3. Evaporation
4. Distillation
5. Fractional Distillation
6. Gravitational Separation