Bonding

Question 1

Why does graphene conduct electricity well? /5

Answer 1

-only 3 electron per carbon atom in bonds
-so one electron per carbon atom is delocalised
-so those delocalised electrons move throughout structure
-carrying electrical charge
-so graphite can conduct electricity

Question 2

Why does reactivity of elements going down group 1 increase. /4

Answer 2

Reactivity decreases going down the group
-because outer electron shell is further from the nucleus
-so there is less attraction between nucleus and outer electron shell
-so atom loses electron more easily

Question 3

Low melting/boiling point of something

Answer 3

-weak intermolecular forces
-don’t need a lot of energy to overcome

Question 4

High melting/boiling point of something

Answer 4

-strong bonds
-lots of energy needed to overcome

Question 5

Metals made up of

Answer 5

Ions

Question 6

Non metals made up of…

Answer 6

Atoms

Question 7

Do strong intermolecular forces exist?

Answer 7

NO

Question 8

Electricity conducted in metal because

Answer 8

-made up of positive ions
-delocalised electrons
-so electrons can flow through metal
-giant lattice structure

Question 9

Gas….?

Answer 9

Weak forces between molecules

Question 10

Ions held together in ion by….?

Answer 10

-held together by electrostatic forces
-oppositely charged ions/atoms
-they attract

Question 11

Independent variable…?

Answer 11

What we are keeping the same

Question 12

Control variable….?

Answer 12

What we are changing

Question 13

Dependant variable….?

Answer 13

What we are measuring

Question 14

Conditions needed for non metals to conduct electricity

Answer 14

-dissolved
-molten/liquid
-so ions are free to move