Name: ………………………………………………………………………………..
1.
The structures of some substances containing chlorine are shown.
a. Answer the following questions about these substances.
i.
Which substance is a diatomic molecule?
......................................................................................................................................................... [1]
ii.
Which substance represents part of an ionic structure?
......................................................................................................................................................... [1]
iii. Which substance is an element?
Explain your answer.
...............................................................................................................................................................
......................................................................................................................................................... [2]
iv.
Determine the simplest formula for substance D.
......................................................................................................................................................... [1]
[2]
[Total: 9]
2.
The structures of some substances containing phosphorus are shown.
a. Answer the following questions about these substances.
i.
Which two of these substances are ionic? .................................................. and......................................... [1]
ii. Which one of these substances is an element? Explain your answer.
................................................................................................................................
................................................................................................................................ [2]
iii. Determine the simplest formula for substance D.
................................................................................................................................ [1]
(iv) balance the following equations
……. NH3 +
…… CuO
→
…….. Cu + ……. H2O
+
N2
[2]
[Total: 11]
b. Gallium is a Group III element. Define the term element.
....................................................................................................................................................................................
....................................................................................................................................................................................
.............................................................................................................................................................................. [1]
(b) Bromine has two isotopes.
(i) Define the term isotope.
.............................................................................................................................................
....................................................................................................................................... [2]
(ii) Explain why the two isotopes of bromine have the same chemical properties.
.............................................................................................................................................
....................................................................................................................................... [2]
2.
Draw the dot and cross diagram of
a.
H2O
b.
CH4
c.
CO2
d.
MgCl2
e.
Al2O3
[10 Marks ]