Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > C3 Structure And Bonding > Flashcards

C3 Structure And Bonding Flashcards

1
Q

How do particles move in a substance in the solid state

A

They vibrate in place

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Why can a liquid flow

A

The particles can slide over each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why can a gas be compressed

A

There is a lot of space between the gas molecules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is energy transferred from the substance to the surroundings when a substance freezes

A

Bonds between atoms get stronger

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How do metal atoms form ions

A

Metals loose electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What type of forces hold an ionic lattice together

A

Electrostatic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Why do ionic compounds have higher melting and boiling points

A

As a lot of heat energy is needed to break the strong electrostatic forces between oppositely charged ions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

When can a ionic compound conduct electricity and why

A

When they’re molten or liquid or dissolved in a solution . This is Becuase the ions are free to move around in order to carry a charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a covalent bond

A

Sharing a pair of electrons between 2 non - metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When a substance made of small molecules boils what does the energy over come

A

Intermolecular forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why do simple covalent molecules have low boiling points

A

The intermolecular forces are weak and need little energy to overcome

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why can’t simple covalent molecules conduct electricity

A

As they have no overall charge meaning they can’t carry electrical charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does allotrope mean

A

Different types

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How many covalent bonds does each carbon atom in graphene form

A

3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What’s the formula for buckminsterfullerene

A

C60

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Why is graphene a good conductor of electicity

A

Each carbon atom makes 3 covalent bonds
Allowing 12 electron per carbon to be delocalised
And carry charge

17
Q

Why does diamond have a higher melting point

A

Large amounts of energy needed to overcome the strong covalent bonds Allowing

18
Q

Why is graphene soft and slippery

A

They have weak intermolecular forces betweeen the layer which require energy to overcome them

19
Q

Why do giant covalent structures generally not conduct electricity

A

They have no delocalised electrons or free ions

20
Q

How are the particles bonded together in metals

A

Electrostatic forces between positive ions and delocalised electrons

21
Q

Why are metals good conducts of heat and electric

A

They have delocalised electrons which are free to move and carry charge

22
Q

Why are metals good conducts of heat and electric

A

They have delocalised electrons which are free to move and carry charge

23
Q

Why do metals have higher melting points

A

They have strong electrostatic attractions between positive ions and delocalised electrons

24
Q

Why can metals be bent and shaped

A

As the layers of ions can easily slide over each other

25
Q

What is an alloy

A

Consists of a mixture of metals

26
Q

Why are pure metals softer than alloys

A

Layers are distorted in alloys so the layers cannot slide over each other easily

27
Q

Why do ionic compounds not conduct in their solid state

A

Their ions are held in a fixed position and cannot leave

28
Q

What charge do group 2 metal ions have

A

2+

29
Q

What charge do group 6 ions have

A

-2

30
Q

What type of force hold ions together on giant ionic compounds

A

Electrostatic forces

31
Q

What type of bond is formed when 2 pairs of electrons are shared

A

Double covalent bond

32
Q

Describe the structure of a metal

A

Layers of positive ions surrounded by a sea of delocalised electrons

33
Q

Describe how the ionic compound magnesium fluoride is formed

A

Magnesium atom looses 2 electrons
Becoming a +2 ion
Each fluorine atom accepts an electron each
Becoming a -1 ion

Chemistry (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions