Elements, Mixtures & Compounds - Unit 1 Topic 1

Question 0

What is an element?

Answer 0

Material that can’t be split into anything by chemical means. Contains 1 type of atom.

Question 1

What is a molecule?

Answer 1

2+ atoms chemically bonded together. Atoms can be same or different.

Question 2

Give me 3 qualities of metals?

Answer 2

Shiny Malleable & ductile Solid at normal temperature (not Mercury) Good electrical conductors Good heat conductors High melting/boiling points

Question 3

Give me 3 qualities of non-metals?

Answer 3

Dull (except diamond) Soft & brittle (except diamond) Can be gas/solid/liquid at room temperature Bad conductors of heat Bad conductors of electricity (except graphite) Low melting/boiling points

Question 4

What is a compound?

Answer 4

Material made of 2+ different elements chemically bonded together. Difficult to separate. Can only be broken down by chemical means. Different properties from elements making up them.

Question 5

What is a mixture?

Answer 5

2+ substances mixed together. Easy to separate. Same properties as elements made of.

Question 6

What does soluble mean?

Answer 6

Solid that dissolves in a liquid solvent (sugar/salt)

Question 7

What does insoluble mean?

Answer 7

Solid that doesn’t dissolve in a liquid solvent (sand)

Question 8

What is a solute?

Answer 8

Substance that dissolves in a liquid. (Salt/sugar)

Question 9

What is a solvent?

Answer 9

Substance that dissolves a solid. (Water)

Question 10

What is a solution?

Answer 10

Mixture of a solvent and solvent (salty water)

Question 11

What is the residue?

Answer 11

Solid trapped in filter paper. (Sand)

Question 12

What is the filtrate?

Answer 12

Liquid that passes through the filter paper. (Water)

Question 13

What is the distillate?

Answer 13

Condensed liquid in distillation, collected. (Water)

Question 14

What does miscible mean?

Answer 14

Liquid that mixes with another liquid. (Ethanol & water)

Question 15

What does immiscible mean?

Answer 15

Liquid that doesn’t mix with another liquid (oil & water)

Question 16

What is filtration?

Answer 16

Separates insoluble solid from liquid (sand & water)

Question 17

What is evaporation/crystallisation?

Answer 17

Separates solute from solvent (salt & water)

Question 18

What is a Separating funnel for?

Answer 18

Separates 2 immiscible liquids (oil & water)

Question 19

What is chromatography for?

Answer 19

Separate colours in dyes.

Question 20

What is mass spectrometry for?

Answer 20

To determine RAM/RMM.

Question 21

How do you find RAM? What is it?

Answer 21

Relative Atomic Mass. ( a% x mass) + (b% x mass) (——————————-) (. 100. )

Question 22

Why are 2 pros & 2 cons of Mass Spectrometry?

Answer 22

Pros - fast. Results linked to database. Cons - expensive. Isotopes mean 1+ peaks.

Question 23

What is HPLC for? What is it?

Answer 23

High Performance Liquid Chromatography Number of components In a mixture.

Question 24

2 pros & 2 cons of HPLC?

Answer 24

Pros - fast & accurate Cons - must be liquid, expensive.

Question 25

What is fractional distillation for?

Answer 25

It separates 2 soluble liquids with different boiling points.

Question 26

Draw a diagram of filtration

Answer 26

Question 27

Draw a diagram of evaporation.

Answer 27

Question 28

Draw a diagram of a separating funnel

Answer 28

Question 29

Draw a diagram of chromatography

Answer 29

Question 30

Draw a diagram of fractional distillation

Answer 30

Question 31

Draw a diagram of mass spectrometry

Answer 31

Question 32

Draw a diagram of HPLC

Answer 32