Metals And Bonding

Question 0

Explain the structure of Graphite

Answer 0

Carbon atoms linked covalently to THREE other carbon atoms

Question 1

Explain the structure of Diamond

Answer 1

Carbon atoms are linked covalently to FOUR other carbon atoms

Question 2

What is the importance of the fourth electron in the Graphite structure?

Answer 2

Graphite is a sea of free moving electrons because the fourth electron is unbonded

Question 3

List 4 properties of Graphite..

Appearance
Hardness
Conductivity
Melting point

Answer 3

Grey/black shiny solid
Very soft
Conducts electricity
Very high over 3600 degrees

Question 4

What is a usage of graphite?

Answer 4

Pencil lubricants

Question 5

List 4 properties of Diamond..

Appearance
Hardness
Conductivity
Melting point

Answer 5

Transparent/crystalline
Very hard
Electrical insulator
Very high over 3500 degrees

Question 6

Name two uses of diamond?

Answer 6

Gemstones

Glass cutting, drill bits

Question 7

What are carbon nanotubes?
Conduct
Strength
Density 
Use

Answer 7

Roles of carbon hexagons
Conduct electricity ( used in semi conductors)
Very small diameter (10,000 times less than hair)
Extremely strong
Very Low density
Small electronic circuits

Question 8

Property of Aluminium

Answer 8

Low density

Aeroplanes

Question 9

Property of Ceramic

Answer 9

Hardness
Strength

Ceramic floor tiles

Question 10

Property of diamond

Answer 10

Hardness
Lustrous

Gemstone

Question 11

Property of Aluminium Oxide

Answer 11

Low friction

Low wear

Question 12

Property of Teflon

Answer 12

Low friction
High melting point

Frying pan

Question 13

Property of glass

Answer 13

Hardness

Transmits light

Question 14

What is metallic bonding?

Answer 14

The electrostatic attraction between positive metal ions and delocalised electrons

Question 15

In metallic bonding can they conduct electricity?

Answer 15

Yes

The electrons are free to move -move freely through the lattice

Question 16

What are the melting points and boiling points of metals which have been metallically bonded together?

Answer 16

HIGH

STRONG attraction between the positive ions and negative electrons so takes a lot of ENERGY to break the metallic bonds

Question 17

What is an ionic bond?

Answer 17

An electrostatic attraction between two oppositely charged ions

Question 18

Does ionic bonds conduct electricity?

Answer 18

NO - as a solid ◼️

YES - molten or in solution

Question 19

Does ionic bonding have high or low melting and boiling points?

Answer 19

HIGH

giant lattice is held together by strong ionic bonds so it takes a LARGE amount of ENERGY to break

Question 20

What is Covalent bonding?

Answer 20

Strong attraction between nuclei and a shared pair of electrons

Question 21

What holds atoms together in simple molecular compounds?

Answer 21

Covalent bonds

Question 22

Do covalent bonds have low or high melting and boiling points?

Answer 22

LOW

Very LITTLE energy needed to over come INTERMOLECULAR forces

Question 23

Do covalent bonds conduct electricity?

Answer 23

NO - No charged particles to flow

Question 24

Which is the strongest bond?

Answer 24

COVALENT