C2

Question 1

Whats atmoic number?

Answer 1

How many protons in an atom

Question 2

Whats atomic mass number?

Answer 2

Number of protons and neutrons

Question 3

Whats an isotope?

Answer 3

Different forms of same element that have same number of protons but different number of neutrons

Question 4

Two properties of ionic compounds?

Answer 4

• high melting and boiling points

- they conduct electricity when molten or aqueous

Question 5

How to make dry insoluble salts

Answer 5

Pick two soluble salts mix them with distilled water and filter them through paper into a conical flask and rinse the liquid away for a hard salt

Question 6

Whats number of protons equal to?

Answer 6

Electrons

Question 7

What is an electrons charge?

Answer 7

1/2000

Question 8

When an anion joins a cation what does it form?

Answer 8

Ionic bonds

Question 9

What happens in ionic bonding?

Answer 9

Atoms transfer electrons to form a charged ion (group of atoms)

Question 10

What colour flame does sodium give?

Answer 10

Orange/yellow

Question 11

Flame of calcium?

Answer 11

Brick red

Question 12

Copper flame?

Answer 12

Blue green flame

Question 13

Whats spectroscopy used for?

Answer 13

To identify elements

Question 14

What are covalent bonds?

Answer 14

Bonds that share electrons between two atoms

Question 15

Four properties of diamond?

Answer 15

• four covalent bond forms each carbon atom
• very rigid covalent structure
• really hard
• doesnt conduct electricity cause theres no free electrons

Question 16

three detailed properties of graphite?

Answer 16

• each carbon atom forms 3 covalent bonds which slide easily making it a good lubricant
• layers are held together loosely so can be rubbed onto paper
• lots of spare delocalised atoms so its a good conducter of electricity

Question 17

What does immiscible mean?

Answer 17

When liquids dont mix but float on one another

Question 18

Whats miscible liquids?

Answer 18

When they mix together completely

Question 19

How do you seperate immiscible liquids?

Answer 19

Shake them together, the denser liquid sinks and other forms at top, then use a seperating funnel with a tap and allow the denser liquid out into a beaker and close tap

Question 20

what seperates miscible liquids?

Answer 20

Fractional distillation

Question 21

Whats Rf value formula?

Answer 21

Distance travelled by substance divided by distance travelled by substance

Question 22

Two properties of metals?

Answer 22

• conduct heat and electricit well

- malleable, so can make different shapes

Question 23

Two properties of transition metals?

Answer 23

• hugh melting points

- colourful components

Question 24

What happens when you put lithium in water?

Answer 24

• the lump of lithium moves around surface slowly fizzing

- water beckma alkaline so goes purple

Question 25

What happens with sodium and water?

Answer 25

Sodium fizzes and moves quickly, may ignite

Question 26

What happens with pottasium and water?

Answer 26

Moves cigaroysly burns with lilac flame and explodes sometimes

Question 27

What does the reaction of an alkali metal and water produce?

Answer 27

Hydrogen

Question 28

What is an endothermic process?

Answer 28

Bond breaking

Question 29

Whats an exothermic process?

Answer 29

When a bond forms

Question 30

What is an exothermic reaction?

Answer 30

A reaction that gives out energy shown by temperature rise

Question 31

Whats an endothermic reaction?

Answer 31

A reaction that takes in energy and is shown by fall in temperature

Question 32

What four things affect the rate of reaction?

Answer 32

- temperature - concentration - surface area - catalyst

Question 33

What does a catalyst do?

Answer 33

Speed up the rate of reaction

Question 34

What does higher temperatures do?

Answer 34

Increase colisions as particles move faster

Question 35

What does increased concentration do?

Answer 35

Increases the amount of particles so collisions are more likely

Question 36

What are faster collisions caused by

Answer 36

Increase in temperature

Question 37

Whats the yield of a reaction?

Answer 37

The amount of prduct a reaction should produce