covalent bonding/simple molecular substances

Question 1

what’s a bond between ?

Answer 1

2 non metals

Question 2

what do covalent bonds share

Answer 2

pairs of electrons

Question 3

what type of bonds do they have ?

Answer 3

strong bonds

Question 4

can covalent bonds conduct electricity

Answer 4

they have no free ions or electrons so they can’t conduct electricity

Question 5

what type of bond do giant covalent bonds have ?

Answer 5

strong covalent bonds that would need quite a lot of energy to overcome

Question 6

list 2 examples of giant covalent structures

Answer 6

Dimond
graphite

Question 7

what physical state are allotropes in ?

Answer 7

all allotropes have different structured forms of the same element but have the same physical state

Question 8

what are fullerenes ?

Answer 8

fullerenes are a group of carbon allotropes which consist of molecules

Question 9

list 3 things about graphite

Answer 9

1.has layers that can slide over each other
2.every carbon atom is bonded to 3 other atoms to make delocalised atoms
3.one layer of graphite is graphene

Question 10

list 2 things about Diamond

Answer 10

1.has very high melting and boiling point because of the strong bonds
2.its so hard it doesn’t conduct electricity

Question 11

list 3 things abt metallic bonding

Answer 11

1.high melting and boiling point
2.good electrical conductor because the delocalised negative electron can carry the electrical charge with it
3.good heat conductor because the delocalised electrons are free to move and transfer the heat

Question 12

list 2 things abt metallic bonding

Answer 12

1.a lot of energy would be needed to overcome the strong electrostatic forces
2.metals have strong electrostatic forces because of the attraction between the positive and delocalised electrons

Question 13

what is metallic bonding ?

Answer 13

positive ions in a sea of delocalised (free) electrons

Question 14

why does metallic bonding happen ?

Answer 14

the outer electrons from the metal atom are delocalised

Question 15

how can u describe metalic bonding

Answer 15

a strong electrostatic force of attraction between a positive electron and neg delocalised electron

Question 16

a what forces does a larger covalent substance have ?

Answer 16

weak intermolecular forces between polymer chains are larger so more energy is needed to overcome them