allotropes of carbon and nonochemistry

Question 1

what are the 2 materials made from carbon?

Answer 1

graphite and diamond

Question 2

name 3 properties of graphite

Answer 2

black, soft and slippery, high melting point, insoluble in water, conducts electricity

Question 3

name 3 properties of diamond

Answer 3

colourless, transparent, very hard, high melting point, insoluble in water, does not conduct electricity

Question 4

how is diamond formed?

Answer 4

when extreme heat and pressure forces carbon deposits to crystallise deep inside the earth

Question 5

when is graphite made?

Answer 5

when carbon deposits are changed when metamorphic rock forms

Question 6

what allows a diamond to be shaped when it is formed?

Answer 6

slight imperfections occur forming cleaving planes allowing them to be shaped

Question 7

what causes the mark on a paper with graphite?

Answer 7

layers slide off and mark the paper

Question 8

how many electrons do carbon atoms have in the outer shell?

Answer 8

4

Question 9

describe how the carbon atoms are attached in a diamond?

Answer 9

every atom is attached to four others in a three dimensional
tetrahedral lattice

Question 10

why does diamond have a high melting point?

Answer 10

the arrangement of carbon bonds gives strength in all directions

Question 11

why does diamond not conduct electricity?

Answer 11

there is an absence of free electrons