Chemistry Unit 3

Question 1

How is a Metallic Bond formed?

Answer 1

The outer electrons are delocalised and the positive metal ions are attracted to negative delocalised ions which acts as a glue

Question 2

What’s Metallic bonding?

Answer 2

Metallic bonding is the electrostatic force of attraction between positively charged ions and delocalised electrons

Question 3

Why are delocalised electrons the reason for metals being conductors of electricity?

Answer 3

For a substance to conduct electricity it must allow these electrons to flow through it and metals do this very well

Question 4

What does metal + water make?

Answer 4

Metal Hydroxide + Hydrogen

Question 5

What does metal + Acid make?

Answer 5

Salt + Hydrogen

Question 6

What does metal + Oxygen make?

Answer 6

Metal Oxide

Question 7

Why does some metals not take part in reactions?

Answer 7

Depending on the reactivity of the metals ie gold because it’s very unreactive

Question 8

What’s displacement reactions?

Answer 8

A type of Redox reaction

Question 9

Define a displacement reaction?

Answer 9

When a metal higher in the electrochemical series is put in a solution of a metal lower on the ecs it kicks it out

Question 10

Will a metal react with an acid?

Answer 10

A metal will react with acid if it’s higher than hydrogen in the ECS

Question 11

What’s the electron flow in a redox reaction?

Answer 11

Electrons flows from the metal higher in the ECS to the metal lower in the ECS through the wire

Question 12

Whats an ion bridge?

Answer 12

A bridge used to complete the circuit

Question 13

What’s a half cell?

Answer 13

Is a metal electrode in a solution of its own ions which is done to avoid any side reactions

Question 14

What’s the two types of polymerisation?

Answer 14

Addition and condensation reactions

Question 15

What’s the main nutrients of a fertiliser?

Answer 15

Nitrogen, phosphorus and potassium

Question 16

What’s used in a haber process?

Answer 16

Iron Catalysts

Question 17

How is radioactivity created?

Answer 17

Caused by a unstable nucleus

Question 18

What’s background radiation?

Answer 18

Radiation that we are exposed to daily

Question 19

Why are atoms unstable?

Answer 19

They have an unstable proton/neutron ratio

Question 20

What’s your 3 types of radiation?

Answer 20

Alpha, Beta, Gamma

Question 21

How would you stop alpha radiation?

Answer 21

Few cm of air/paper

Question 22

How would you stop beta radiation?

Answer 22

Thin sheet of aluminium

Question 23

How would you stop gamma radiation?

Answer 23

Thick layer of concrete/lead

Question 24

What happens when alpha decay takes place?

Answer 24

It lowers the mass number by 4 and lowers the atomic number by 2

Question 25

What happens when beta decay happens?

Answer 25

Increases the atomic number by one, mass number is unchanged

Question 26

What’s half life?

Answer 26

The time taken for the mass to decrease by half

Question 27

What does ammonia+water make?

Answer 27

Ammonia solution

Question 28

What does nitric acid+Ammonium hydroxide make?

Answer 28

Ammonium nitrate+Water

Question 29

Tell me about ammonia?

Answer 29

Full structure=trigonal pyramidal shape Formula=NH3 Properties=strong smell, gas at room temp Solubility= very soluble

Question 30

What’s alpha radiation made from?

Answer 30

2 protons 2 neutrons

Question 31

What’s beta radiation made from?

Answer 31

Electron

Question 32

What’s gamma radiation made from?

Answer 32

energy (EM wave)

Question 33

What’s a property of chalk and most non metals?

Answer 33

That they are brittle

Question 34

What’s a property of metal?

Answer 34

They are malleable Held together by an attraction between the sea of delocalised electrons and the positive ions created when the atoms give up their outer electrons to this sea

Question 35

How do you react a metal with oxygen?

Answer 35

Burn it in a Bunsen or near a chemical that releases oxygen to then make a metal oxide

Question 36

What’s the trend of how easy is it to extract the metal from an ore?

Answer 36

The more reactive the harder to extract

Question 37

What’s needed to extract pure metal?

Answer 37

A small amount of heat is needed

Question 38

What’s your three types of extraction?

Answer 38

Heat Electrolysis Heat + Carbon or CO2

Question 39

What do you extract in extraction process?

Answer 39

Metals found as ores

Question 40

What’s an electrolyte?

Answer 40

A solution with free ions in it

Question 41

What does metals react with?

Answer 41

Water Acid Oxygen

Question 42

What does the term electrolysis mean?

Answer 42

Breaking down ionic compound usuing electricity