Bonding

Question 1

Size, made from what particles, bonding and electrons are… for water

Answer 1

small molecule, atoms, covalent, shared

Question 2

Size, made from what particles, bonding and electrons are… for graphite

Answer 2

giant, atoms, covalent, shared

Question 3

Size, made from what particles, bonding and electrons are… for silicon dioxide

Answer 3

giant, atoms, covalent, shared

Question 4

Size, made from what particles, bonding and electrons are… for sodium chloride

Answer 4

giant, ions, ionic, transferred

Question 5

Size, made from what particles and bonding for copper

Answer 5

giant, ions and delocalised electrons, metallic

Question 6

Melting point of water (high or low) and why

Answer 6

low because it is a small molecule with weak intermolecular forces which only require little energy to break

Question 7

Melting point of graphite (high or low) and why

Answer 7

high because it is a giant structure with many strong bonds that require lots of energy to break

Question 8

Melting point of silicon dioxide (high or low) and why

Answer 8

high because it is a giant structure with many strong bonds that require lots of energy to break

Question 9

Melting point of sodium chloride (high or low) and why

Answer 9

high because it is a giant structure with many strong bonds that require lots of energy to break

Question 10

Melting point of copper (high or low) and why

Answer 10

high because it is a giant structure with many strong bonds that require lots of energy to break

Question 11

Does water conduct electricity and why

Answer 11

no because there are no free moving electrons to carry a charge as they are all used up in bonding

Question 12

Does graphite conduct electricity and why

Answer 12

yes because there are free moving electrons that can carry a charge between the layers

Question 13

Does silicon dioxide conduct electricity and why

Answer 13

no because there are no free moving electrons to carry a charge as they are all used up in bonding

Question 14

Does sodium chloride conduct electricity and why

Answer 14

yes when molten or dissolved in water because then the ions are free to move and carry a charge

Question 15

Does copper conduct electricity and why

Answer 15

yes because there are delocalised electrons that are free to move and carry a charge

Question 16

Is graphite hard, malleable or soft/slippery

Answer 16

soft/slippery because there are weak intermolecular forces between the layers which are easy to break so the layers slide over each other

Question 17

Is silicon dioxide hard, malleable or soft/slippery

Answer 17

hard because it is a giant structure with many strong bonds

Question 18

Is sodium chloride hard, malleable or soft/slippery

Answer 18

hard because it is a giant structure with many strong bonds

Question 19

Is copper hard, malleable or soft/slippery

Answer 19

malleable because it has same sized ions which form regular layers so they can easily slide over each other