covalent bonding

Question 1

how is covalent bond formed?

Answer 1

between atoms by sharing a pair of electrons in order to gain a full outer shell
by strong electrostatic attraction between positive nuclei and the shared pair of electrons

Question 2

structure of covalent bonding ?

Answer 2

giant covalent lattice
simple covalent molecular

Question 3

dot and cross covalent

Answer 3

circles do touch

Question 4

why does simple molecular has low boiling and melting point?

Answer 4

due to weak intermolecular forces of attraction
little energy is required to overcome

Question 5

why giant covalent lattice has high boiling and melting points?

Answer 5

strong covalent bonds with lots of energy required to overcome

Question 6

do covalent compounds conduct electricity?

Answer 6

no

Question 7

how is melting and boiling points increase with increasing molecular mass?

Answer 7

it increases with increasing mass as there is more electrostatic bonds to overcome

Question 8

graphite
physical properties

Answer 8

soft slippery
conduct electricity
wear forces of attraction between the layers which can easily slide

Question 9

diamond physical properties

Answer 9

high melting point
can’t conduct electricity

Question 10

C60 physical properties

Answer 10

can’t conduct electricity
soft
low melting point