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Study Decks > Chemistry Unit 3 > Flashcards

Chemistry Unit 3 Flashcards

1
Q

How is a Metallic Bond formed?

A

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

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2
Q

What’s Metallic bonding?

A

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

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3
Q

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

A

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

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4
Q

What does metal + water make?

A

Metal Hydroxide + Hydrogen

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5
Q

What does metal + Acid make?

A

Salt + Hydrogen

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6
Q

What does metal + Oxygen make?

A

Metal Oxide

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7
Q

Why does some metals not take part in reactions?

A

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

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8
Q

What’s displacement reactions?

A

A type of Redox reaction

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9
Q

Define a displacement reaction?

A

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

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10
Q

Will a metal react with an acid?

A

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

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11
Q

What’s the electron flow in a redox reaction?

A

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

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12
Q

Whats an ion bridge?

A

A bridge used to complete the circuit

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13
Q

What’s a half cell?

A

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

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14
Q

What’s the two types of polymerisation?

A

Addition and condensation reactions

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15
Q

What’s the main nutrients of a fertiliser?

A

Nitrogen, phosphorus and potassium

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16
Q

What’s used in a haber process?

A

Iron Catalysts

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17
Q

How is radioactivity created?

A

Caused by a unstable nucleus

18
Q

What’s background radiation?

A

Radiation that we are exposed to daily

19
Q

Why are atoms unstable?

A

They have an unstable proton/neutron ratio

20
Q

What’s your 3 types of radiation?

A

Alpha, Beta, Gamma

21
Q

How would you stop alpha radiation?

A

Few cm of air/paper

22
Q

How would you stop beta radiation?

A

Thin sheet of aluminium

23
Q

How would you stop gamma radiation?

A

Thick layer of concrete/lead

24
Q

What happens when alpha decay takes place?

A

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

25
Q

What happens when beta decay happens?

A

Increases the atomic number by one, mass number is unchanged

26
Q

What’s half life?

A

The time taken for the mass to decrease by half

27
Q

What does ammonia+water make?

A

Ammonia solution

28
Q

What does nitric acid+Ammonium hydroxide make?

A

Ammonium nitrate+Water

29
Q

Tell me about ammonia?

A

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

30
Q

What’s alpha radiation made from?

A

2 protons
2 neutrons

31
Q

What’s beta radiation made from?

A

Electron

32
Q

What’s gamma radiation made from?

A

energy (EM wave)

33
Q

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

A

That they are brittle

34
Q

What’s a property of metal?

A

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

35
Q

How do you react a metal with oxygen?

A

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

36
Q

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

A

The more reactive the harder to extract

37
Q

What’s needed to extract pure metal?

A

A small amount of heat is needed

38
Q

What’s your three types of extraction?

A

Heat
Electrolysis
Heat + Carbon or CO2

39
Q

What do you extract in extraction process?

A

Metals found as ores

40
Q

What’s an electrolyte?

A

A solution with free ions in it

41
Q

What does metals react with?

A

Water
Acid
Oxygen

42
Q

What does the term electrolysis mean?

A

Breaking down ionic compound usuing electricity

Study Decks (4 decks)

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