Period 3: Sodium to Argon

Question 1

explain the variations in
physical properties of the
elements in terms of
structure and bonding;

Include reference to melting
point and electrical
conductivity. Atomic and
ionic radii, electronegativity
and density. Refer to Module
1, Specific Objective 1.11.

Question 2

describe the reactions of
the elements with oxygen,
chlorine and water;

No treatment of peroxides
or superoxides required.

Question 3

explain the variation in
oxidation number of the
oxides and chlorides;

Question 4

describe the reactions of
the oxides and chlorides
with water;

Include equations.

Question 5

explain the trend in the
acid/base behaviour of the
oxides and hydroxides;

Include equations

Question 6

predict the types of
chemical bonding present
in the chlorides and oxides;
and,

Refer to differences in
electronegativities and ionic
radii of the elements.

Question 7

discuss the uses of some of
the compounds of
aluminium and
phosphorous.

Limited to the use of
aluminium hydroxide in
antacid medication, white
phosphorous used in flares
and military applications,
red phosphorous used at
the side of match boxes and
argon used in fluorescent
and incandescent lighting.