1 g Covalent bonding Flashcards

1.44 - 1.51

1
Q

What atoms form covalent bonds

A

Non-metals

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

How do non-metals obtain a full outer shell

A

Share pairs of electrons

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

What are the 2 types of covalent bonding

A

Small or giant molecules

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

Covalent bonds are strong or weak

A

Strong

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

What are the intermolecular forces

A

Forces that hold the molecules together

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

Are intermolecular forces strong or weak

A

Weak

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

What are shared electrons called

A

Bonding electrons

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

Do simple covalent structures conduct electricity and why

A

No, there are no free electrons

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

Where do the strong electrostatic forces come from

A

Between a shared pair of electrons (negative) and the nuclei (positive)

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

What are covalent bonds represented by

A

A line between two atoms ( H-H )

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

Are the shared electrons in a fixed position or in constant motion

A

Constant motion (charge clouds)

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

Why do covalent bonds share electrons

A

To achieve electron configuration close to a noble gas (More stable)

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

Three examples of simple molecular structure

A

Cl₂, H₂O, CO₂

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

What are the bonds of the following diatomic molecules: H₂, Cl₂, O₂, N₂, HCL

A

H-H, Cl-Cl, O=O, N-=N, H-Cl

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

What are the bonds of the following inorganic molecules H₂O, NH₃, CO₂

A

H-O-H, H-N-H -H, O=C=O

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

What are the bonds of the following organic molecules CH₄, C₂H₆, C₂H₄

A

H- H-C-H -H, H- H- H-C-C-H -H -H, H- H-C=C-H -H

17
Q

What are simple molecular structures

A

Covalent bonds joining the atom together, But have intermolecular forces

18
Q

Why do they have low melting points

A

Weak intermolecular forces acting between the molecules (Gases & liquids at room temp.)

19
Q

What are intramolecular forces

A

Strong covalent bonds holding the atoms in a molecule

20
Q

As the relative molecular mass of a substance increases, the … increase aswell

A

Melting & boiling points

21
Q

Why are covalent compounds poor conductors

A

No free ions or electrons to carry the charge

22
Q

How many atoms do simple molecules contain

A

A fixed number

23
Q

How many atoms do giant covalent structures contain

A

Huge numbers

24
Q

Another name for giant covalent structures

A

Giant lattices

25
Three common macromolecules
Diamonds, Graphite, Fullerene
26
In diamond, each carbon atom bonds with how many other carbons
4
27
Are there intermolecular forces in giant covalent bonds
No
28
Are giant covalent bonds strong or weak
Very strong
29
Properties of Diamond
-Doesnt conduct electricity -Very high melting point -Extremely hard
30
In diamond, each carbon atom bonds with how many other atoms
3, leaving one free electron per carbon atom
31
Where are the free electrons in a graphite
Migrate along the layers
32
Can graphite conduct electricity and why
Yes, they have a delocalised electrons that can move and carry charge
33
Are the covalent bonds within the layer strong or weak (graphite)
Very strong
34
Are the intermolecular forces betweenthe layers strong or weak
Weak, the layers can slide on top of each other, making graphite soft and slippery
35
Properties of graphite
-Conduct electricity and heat -Very high melting point -Soft and slippery -Less dense than diamond
36
What shape does fullerene exist in
Hollow tubes, spheres
37
Two industrial features of fullerene
-Traps catalyst molecules (high surface area) -Lubricants
38
How many bonds in fullerene per a carbon atom
3