1
2
What is the maximum number o electrons that
can occupy a d sublevel?
6
A. C l -
A. 2
B . K+
B. 5
C . B r-
C. 6
D . F-
D. 1 0
IB , May 2 01 0
Which o the ollowing elements can be
classifed as metalloids?
I.
7
III. A clear, colourless solution is ormed.
A. I and II only
A I and II only
I and III only
C
II and III only
D
I, II, and III
A gas is evolved.
II. The temperature o the water increases.
III. Te
B
[1 ]
What happens when sodium is added to water?
I.
Al
II. S i
3
Which ion has the largest radius?
B . I and III only
C . II and III only
D . I, II, and III
[1 ]
IB , November 2 009
How many valence electrons does selenium
contain?
8
A. 2
Which oxides produce an acidic solution when
added to water?
B. 6
I.
P 4O 1 0
C. 1 6
II. MgO
D. 34
III. S O 3
A. I and II only
4
B . I and III only
Which o the ollowing elements are alkaline
earth metals?
I.
C . II and III only
D . I, II, and III
Rb
[1 ]
IB , May 2 01 0
II. S r
III. B a
9
B . I and III only
Which statement about the elements in group
1 7 is correct?
C . II and III only
A. B r 2 will oxidize C l - .
D . I, II, and III
B . F 2 has the least tendency to be reduced.
A. I and II only
C . C l2 will oxidize I- .
5
D . I2 is a stronger oxidizing agent than F 2 .
Which property generally decreases across
period 3 ?
IB , May 2 01 1
A. Atomic number
B . Electronegativity
C . Atomic radius
D . First ionization energy
IB , May 2 01 1
[1 ]
[1 ]
10 How many o the ollowing oxides are
amphoteric?
1 2 D escribe and explain what you will see i
chlorine gas is bubbled through a solution o:
Na 2 O , MgO , Al 2 O 3 , S iO 2
a) potassium iodide
[2 ]
A. None
b) potassium fuoride.
[1 ]
B. 1
IB , May 2 01 0
C. 2
D. 4
1 3 The alkali metals are ound in group 1 o the
periodic table o elements.
1 1 The periodic table shows the relationship
between electron arrangement and the
properties o elements and is a valuable tool or
making predictions in chemistry.
a) Identiy the property used to arrange the
elements in the periodic table.
[1 ]
b) O utline two reasons why
electronegativity increases across
period 3 in the periodic table and
one reason why noble gases are not
assigned electronegativity values.
IB , May 2 01 0
a) S tate the ull electron conguration
o K and its ion, K + .
b) D escribe what you understand by the
term frst ionization energy.
c) S tate and explain how the rst ionization
energies o the alkali metals vary going
down group 1 .
d) E xplain why the ionic radius o K + is
smaller than the atomic radius o the
parent atom, K.
[3 ]
e) S uggest why you should never touch
an alkali metal with your ngers when
working in the laboratory.