Brainscape's Knowledge GenomeTM

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


See full index

Chemistry > Covalent bonding > Flashcards

Covalent bonding Flashcards

1
Q

What is a covalent bond?

A

A shared pair of electrons between two non-metals. 2 positive nuclei are held together by their common attraction of a shared pair of electrons.

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

What are diatomic molecules?

A

These molecules are elements that in their purest form are found in pairs when they are alone.

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

What are the 7 diatomic elements?

A

Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine

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

What are the properties of covalent molecules(discreet)?

A

Low melting point, Low boiling points, poor conductors of electricity, weak forces of attractions between molecules, strong covalent bonds between atoms.

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

What is a covalent network?

A

A covalent network is a very large single molecule made of billions of atoms joined together by covalent bonds.

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

What are examples of covalent Networks?

A

Diamond, Graphite

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

What are the properties of diamond?

A

Very high melting point, very high boiling point cannot conduct electricity does not dissolve

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

What are the properties of graphite?

A

High melting point, high boiling pint, soft substance, can conduct electricity as it has delocalised electrons between the layers.

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

Why do covalent networks substance have very high melting and boiling points?

A

Because the network of strong covalent bonds is not easily broken.

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

What type of bonding and structure does not conduct electricity and have high melting points?

A

Covalent network.

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

What type of bonding does not conduct electricity and have low melting points?

A

Discrete covalent molecular.

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

If graphine can conduct electricity what does that suggest about the electrons in graphene?

A

It has delocalised electrons between the layers.

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

Methane is a covalent molecular substance why is methane a gas at room temperature?

A

Because it has weak bonds bonds between molecules or weak intermolecular forces.

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

explain why covalent network substances have very high melting and boiling points

A

to boil the substance a very high number of strong covalent bonds must be broken

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

Explain why covalent network substances do not conduct electricity

A

no electrons are free to move

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

What happens to compounds such as ma

A
17
Q

Why do covalent compounds have low melting and boiling points

A

When covalent molecular compounds are melted it is only weak forces of attraction between the molecules that are broken\

18
Q

How do covalent molecular compounds not conduct electricity

A

the electrons are not free to move

19
Q

Explain fully how atoms are held together in a covalent bond

A

The positive nuclei of each atom is electrostatically attracted to the shared electrons in the covalent bond

Chemistry (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions