Questions
Q1.
Sodium carbonate and copper chloride are both ionic solids.
They are both soluble in water.
Copper chloride contains copper ions, Cu2+, and chloride ions, Cl–.
Give the formula of copper chloride.
(1)
..............................................................................................................................................
Q2.
(a) The table shows the names and formulae of three ions.
name of ion
calcium
nitrate
phosphate
What is the formula of calcium nitrate?
Put a cross ( ) in the box next to your answer.
formula of ion
Ca2+
NO3–
PO43–
(1)
A Ca2NO3
B CaNO3
C Ca3NO2
D Ca(NO3)2
(b) Complete the sentence by putting a cross (
) in the box next to your answer.
The number of oxygen atoms in the formula Ca3(PO4)2 is
(1)
A 2
B 4
C 8
D 12
(c) The table gives some information about the elements sodium and sulfur.
Sodium sulfide is an ionic compound.
Describe, in terms of electron transfer, how sodium atoms react with sulfur atoms to form sodium sulfide.
Your description should include the charges on the ions formed.
(4)
*(d) Explain the difference in the ability of solid sodium chloride and molten sodium chloride to conduct
electricity in terms
of their structures.
(6)
(Total for Question is 12 marks)
Q3.
Particles and formulae
(a) Atoms contain protons, neutrons and electrons.
Complete the table to show the relative mass and relative charge of each particle and its position in an
atom.
(3)
(b) Complete the sentence by putting a cross (
) in the box next to your answer.
An atom of an element always contains
(1)
A
more protons than neutrons
B
equal numbers of protons and neutrons
C
more electrons than protons
D
equal numbers of protons and electrons
(c) The symbols for some atoms are given in the box
From the box, choose the symbol of
(i) an atom in group 2 of the periodic table
(1)
...........................................................
(ii) an atom that readily forms an ion with a charge of 2−
(1)
...........................................................
(d) The formula of aluminium nitrate is Al(NO3)3
(i) State the total number of atoms in the formula Al(NO3)3
(1)
...........................................................
(ii) What is the most likely formula of aluminium nitride?
Put a cross ( ) in the box next to your answer.
(1)
A
B
C
D
Al(NO3)2
AlNO3
AlNO2
AlN
(Total for question = 8 marks)
Mark Scheme
Q1.
Answer
CuCl2
Acceptable
Mark
answers
(1)
ensure that 2 is
subscript at most half
the size of Cl and
cases are correct
ignore correct
charges reject an
overall charge
Q2.
Answer
(a)
(b)
(c)
D : Ca(NO3)2
C:8
Description including
four of the following
sodium - 2.8.1 / 1
electron in outer
shell (1)
sodium (atoms) lose
electrons (1)
one per atom (1)
(forms) Na+ (1)
sulphur - 2.8.6 / 6
electrons in outer
shell (1)
sulfur (atoms) gain
electrons (1)
two per atom (1)
(forms) S2- (1)
two sodium atoms /
ions combine with
one sulfur atom / ion
(1)
Acceptable
answers
Marks can be gained
using diagrams
mention of shared
electrons / covalent
bonding in words or
diagram = max 2
marks
Mark
(1)
(1)
(4)
formula is Na2S (1)
Indicative Content
*(d)
Level
1
0
1-2
A description
including some of
the following points
solid
regular arrangement/
lattice (of ions)
sodium/Na+ ions
chloride /Cl- ions
(held together by)
strong (ionic) bonds
strong
(electrostatic) forces
of attraction
between oppositely
charged ions /
positive and
negatively
charged ions
closely packed
together
(when solid) does
not conduct
because ions
cannot move
molten
heat energy
overcomes/breaks
(strong ionic) bonds
strong (electrostatic)
forces of attraction
between oppositely
charged ions /
positive and
negatively
charged ions
ions can move
(therefore) conducts
when molten
No rewardable content
Mark
(6)
 a limited explanation e.g. does not
conduct when solid e.g. does conduct when
molten
 the answer communicates ideas using
simple language and uses limited scientific
terminology
 spelling, punctuation and grammar are
used with limited accuracy
2
3-4
 a simple explanation e.g. does not
conduct when solid, does conduct when
molten because ions / particles / atoms can
move
 the answer communicates ideas
showing some evidence of clarity and
organisation and uses scientific terminology
appropriately
 spelling, punctuation and grammar are
used with some accuracy
3
5-6
 a detailed explanation e.g. solid has
strong ionic bonds (between oppositely
charged ions), does not conduct when solid
because ions cannot move, does conduct
when molten because ions can move
 the answer communicates ideas clearly
and coherently uses a range of scientific
terminology accurately
 spelling, punctuation and grammar are
used with few errors
Q3.