Separating mixtures Flashcards
1
Q
What are 3 examples of chemical changes?
A
- flammability
- reactivity with water
- acidity/ alkalinity
1
Q
What are 3 examples of physical changes?
A
colour, size, shape, density, melting point, boiling point, malleability, magnetism
2
Q
What is a chemical change?
A
rearrangement of atoms so new substances are formed
3
Q
what is a physical change?
A
a change that does not rearrange the atoms of substances, only physical properties
4
Q
how is the percentage composition calculated?
A
(mass of component/total mass)*100
