Brainscape's Knowledge GenomeTM

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


See full index

Chemistry - Level 2 > AS91164 Structure/Bonding > Flashcards

AS91164 Structure/Bonding Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards Certified Sommelier Exam (CMS 2) flashcards
1
Q

Ionic Solids

A

Solids composed of positive and negative ions held together by electrostatic attractions in a regular three dimensional crystalline arrangement.

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

Metallic Solids

A

Solids composed of metallic nuclei, held together by a sea of delocalised mobile electrons

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

Covalent Network

A

A 3D arrangement of strong directional covalent bonds between atoms that extends throughout the crystal lattice

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

Molecule

A

Two or more atoms held together by co-valent bonds

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

Ionic Bonds

A

The attractive force between positive and negative ions, which form electrons when transferred from one atom to another

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

Metallic Bonds

A

A bond formed by the attraction between positively charged metal ions and the sea of valence electrons around them

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

Covalent Bond

A

A type of strong chemical bond on which two atoms share one or more pairs of valence electrons

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

Polarity

A

A separation of electric charge in positive and negative regions in a molecule forms a dipole

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

Electrical Conductivity

A

The ability of a material to transfer electricity through a material. Depends on the presence of moving particles

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

Ductile

A

Ability to be drawn into a wire. Needs non-directional bonds

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

Weak Intermolecular Bonding

A

Weak attractive forces between molecules from dipole-dipole interactions

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

Exothermic Reactions

A

Heat is released into from the system
Makes bonds
ΔEnthalpy is negative

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

Endothermic Reactions

A

Heat is taken into the system
Breaks bonds
ΔEnthalpy is positive

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

Solubility

A

In order for something to dissolve in a solvent, the new attractions formed between the solute and solvent must be strong enough to release sufficient energy to overcome the bonds between the molecules in the solute and between the molecules in the solvent.

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

Molecular solids only have…

A

…non-metal atoms like O2 or HCl

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

The m.p./b.p. of molecular solids

A

Low

17
Q

Solubility of molecular solids depends on…

A

Whether the molecules are polar or non-polar

18
Q

Do molecular solids conduct electricity?

A

No

19
Q

Ionic solids contain…

A

..one negative and positive ions

20
Q

The m.p./b.p. of ionic solids

A

High because of the electrostatic forces

21
Q

Are ionic solids soluble?

A

No, because they are neutrally charged

22
Q

Electrical conductivity in ionic solids depends on…

A

…whether the ionic solid is dissolved or not.
When they are dissolved, the ions are mobile.

23
Q

Ionic solids can fracture easily because…

A

When a force is applied the negatively-charged ions move over to a point where they no longer line up to a corresponding positively-charged ion, and instead line up with another negatively-charged ion. As like charges repel, the lattice structure shatters

24
Q

Metallic solids are made up of…

A

…metals only

25
Q

The m.p./b.p. of metallic solids

A

High as the bonds are strong

26
Q

Are metallic solids soluble in water?

A

No. Because the metallic bonds are unable to be overcome by the water molecules. What this means, is that the water molecules are unable to form strong enough bonds to the positively-charged metal nuclei to pull the metallic atoms apart.

27
Q

Are metallic solids electrically conductive?

A

Yes, because they have mobile electrons.

28
Q

Are metallic solids malleable and ductile?

A

Yes, because they have non-directional bonds. The attraction between positively-charged metal nuclei and negatively-charged delocalised electrons have no specific direction, and can therefore occur in any direction.

29
Q

Graphite is composed of…

A

…2D sheets of carbon

30
Q

Can graphite conduct electricity?

A

Yes, because they have delocalized electrons.

31
Q

Are diamonds and graphite soluble?

A

No, because they bonds are too strong to be overcome by water.

Chemistry - Level 2 (3 decks)

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