1 The table gives the melting points, the boiling points and the electrical properties of six
substances A to F.
EO:
substance
melting point boiling point
1°C
1°C
A
-210
-196
B
777
1627
С
962
2212
electrical conductivity electrical conductivity
as a solid
as a liquid
does not conduct does not conduct
does not conduct good conductor
good conductor good conductor
does not conduct does not conduct
does not conduct does not conduct
good conductor good conductor
D
-94
63
E
1410
2355
F
1064
2807
(a) Which two substances could be metals?
(b) Which substance could be nitrogen?
[1]
(c) Which substance is an ionic solid?
[1]
(d) Which substance is a liquid at room temperature?
(1)
(e) Which substance has a giant covalent structure similar to that of diamond? [1]
(0) Which two substances could exist as simple covalent molecules?
[1]
[Total: 6]​