Structure and bonding - P1

Question 1

All noble gases have a ________.

Answer 1

Full outer shell

Question 2

Elements react in order to _____________.

Answer 2

Achieve a full outer energy level

Question 3

Ionic bonding is when __________.

Answer 3

Metals react with a non metal

Question 4

Ionic compounds form _______. These are ______.

Answer 4

giant ionic lattices, 3d structures

Question 5

In a giant ionic lattice, every ________ is surrounded by _________ and vice versa.

Answer 5

positive ion, negative ions

Question 6

________ hold the ions in place (in a giant ionic lattice).

Answer 6

Electrostatic forces of attraction / ionic bonds

Question 7

Ionic compounds have very high ___________.

Answer 7

melting and boiling points

Question 8

Ionic compounds cannot conduct ____________ in a solid, but can when _________.

Answer 8

electricity, melted or dissolved in water

Question 9

In covalent bonding, atoms share ______. Covalent bonds are ____.

Answer 9

electrons, strong

Question 10

Small covalent molecules have low _______, and are usually _________.

Answer 10

boiling points, liquids or gases at room temp.

Question 11

Atoms in each molecule are held together by ________.

Answer 11

Strong covalent bonds

Question 12

The weak forces between each molecule are called ________.

Answer 12

Intermolecular forces

Question 13

Small covalent molecules do not _______, as they have _________.

Answer 13

conduct electricity, no overall charge.

Question 14

Giant covalent molecules contain _______.

Answer 14

millions of covalent bonds

Question 15

Properties of diamond

Answer 15

Formed from carbon
Non - conductive (no delocalized electrons)
Melting point > 3700deg
Carbon atoms form covalent bonds with 4 others

Question 16

Properties of Silicon dioxide (silica)`

Answer 16

Non - conductive
Silicon - oxygen

Question 17

Properties of graphite

Answer 17

Formed from carbon
Soft and slippery
Good electrical and thermal conductor
Hexagonal rings of carbon
Arranged into layers
no covalent bonds between layers (atoms can slide)
has delocalized electrons

Question 18

Properties of graphene

Answer 18

Single layer of graphite (1 atom thick)
Good conductor

Question 19

Properties and uses of buckminsterfullerene

Answer 19

Hollow shapes
60 carbon atoms
rings of carbon atoms

Uses:
lubricant
can deliver drugs into bloodstream

Question 20

Properties and uses of carbon nanotubes

Answer 20

High length / diameter ratio
Rings of carbon atoms
High tensile strength
Has delocalized electrons

Uses
currently being investigated
reinforce materials