Topic 1 - Atomic structure and the periodic table (3)

Question 1

MIXTURES AND CHROMATOGRAPHY:
TRUE OR FALSE: There are no chemical bonds between the different parts of a mixture?

Answer 1

TRUE

Question 2

MIXTURES AND CHROMATOGRAPHY:
What 2 things can the parts of a mixture be?

Answer 2

elements or compounds

Question 3

MIXTURES AND CHROMATOGRAPHY:
Name 5 physical methods that can be used to separate the different pars of a mixture

Answer 3

• filtration
• crystallisation
• simple distillation
• fractional distillation
• chromatography

Question 4

MIXTURES AND CHROMATOGRAPHY:
What is a physical method?

Answer 4

a method that doesn’t involve a chemical reaction, so doesn’t form any new substances

Question 5

MIXTURES AND CHROMATOGRAPHY:
What substances is air mainly made of?
How easily can these be separated?

Answer 5

• air is a mixture of gases
• mainly nitrogen, argon, oxygen and carbon dioxide
  (the gases can be separated out fairly easily)

Question 6

MIXTURES AND CHROMATOGRAPHY:
What is crude oil a mixture of?

Answer 6

different length hydrocarbon molecules

Question 7

MIXTURES AND CHROMATOGRAPHY:
What are the basic properties of a mixture?

Answer 7

a mixture of the properties of the separate parts
(the chemical properties of a substance aren’t affected by it being a part of a mixture)

Question 8

MIXTURES AND CHROMATOGRAPHY:
What would be the properties of a mixture of iron powder and sulfur powder?

Answer 8

• they will show the properties of both the iron and suphur
• it would contain grey magnetic bits of iron and bright yellow bits of sulfur