Group 7 elements

Question 1

explain the variations in
physical properties of the
elements in terms of
structure and bonding; Volatility, density, colour, and state. (An explanation of colour is not required).

Question 2

explain the relative
reactivities of the elements
as oxidising agents;

Include reactions with
sodium thiosulfate and refer
to Eθ values.

Question 3

describe the reactions of
the elements with
hydrogen;

Include equations.

Question 4

explain the relative
thermal stabilities of the
hydrides;

Include bond energies in
explanations.

Question 5

describe the reactions of
the halide ions with:
1.14
(a) aqueous solution of
AgNO3 followed by
aqueous ammonia;
and,

(b) concentrated sulfuric
acid; and,

Question 6

describe the reactions of
chlorine with cold and hot
aqueous solution of
sodium hydroxide.

Include changes in oxidation
number and the process of
disproportionation.
Refer to Module 1, Specific
Objective 4.1.