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WorksheetsCHAPTER 9 PERIODIC TABLE PERIODICITY
Total questions: 18
Worksheet time: 3mins
Name
Class
Date
1.
The following graph shows periodic variation of a physical property when going across periods 2 and 3.What physical property shows the following periodic variation ?
a)
Melting point
b)
Density
c)
Electronegativity
d)
Atomic radius
2.
Which of the following decreases when going across period 3 from left to right ?
a)
Atomic radius
b)
First ionisation energy
c)
Number of valence electrons
d)
Electronegativity
3.
Which of the following causes ionisation energy to increase when going across period 3 from left to right? I.Increase in shielding effect II . Decrease in atomic radius III. Increase in nuclear charge
a)
II and III only
b)
I only
c)
I and II only
d)
I,II and III
4.
In which of the following pairs is the first atom larger than the second atom?
a)
K, Ca
b)
Ne, Ar
c)
CI, P
d)
O, S
5.
Which element in Period 3 has the highest electrical conductivity ?
a)
Aluminium
b)
Sodium
c)
Magnesium
d)
Silicon
6.
Which of the following statements is true about the Period 2 elements?
a)
The atomic radius decreases when the proton number increases.
b)
The melting point increases when going across the period.
c)
The electrical conductivity progressively increases with incease in atomic radius.
d)
The ionisation energy remains constant from left to right of the periodic table.
7.
An element X is a solid with a high melting point. X conducts electricity but is brittle. Which of the following elements is most likely to be X?
a)
Carbon
b)
Sodium
c)
Magnesium
d)
Neon
8.
X is a Period 3 element. Just like the other elements in the same period, X
a)
has three filled valence electron shells.
b)
has low heat of vapourisation.
c)
forms a stable ion that is smaller than its atom.
d)
reacts easily with water at room temperature.
9.
The following equations show the reactions of several Period 3 elements with water or steam. Which reaction is not possible ?
a)
2P+8H2O -> 2H3PO4 + 5H2
b)
2Na+2H2O -> 2NaOH+H2
c)
Mg+H2O -> MgO+H2
d)
CI2+2H2O -> HOCI+HCI
10.
Which of the following elements cannot react with oxygen ?
a)
Chlorine
b)
Sodium
c)
Magnesium
d)
Phosphorus
11.
Period 3 elements form oxides when burnt in air.Which oxide is not possible ?
a)
SO3
b)
MgO
c)
SiO2
d)
P4O10
12.
Although aluminium is a more reactive metal than iron, it does not react with water. This is because
a)
The energy required to change aluminium into its ions is very high.
b)
There is an inert oxide layer on its surface.
c)
Aluminium has a stable, giant metallic structure.
d)
Water molecules cannot form dative bonds with aluminium.
13.
An element X is located in the third period. If X forms a gaseous covalent oxide, XO2, what group is element X most probably placed?
a)
Group 16
b)
Group 2
c)
Group 13
d)
Group 14
14.
Which of the following statements about the Period 3 oxides is correct?
a)
Phosphorus, sulphur and chlorine can form more than one type of oxide.
b)
All the oxides can only dissolve in either an acid or an alkali.
c)
The oxidation number is the highest in the oxide for silicon oxide.
d)
The oxides of phosphorus are all gases at room temperature and pressure.
15.
A 100cm3 gaseous mixture contains equal volumes of nitrogen sulphur dioxide, carbon dioxide, chlorine and oxygen gases. The mixture is passed through concentrated sodium hydroxide solution. What will be the final volumen of the gas after passing through the solution?
a)
40 cm3
b)
20 cm3
c)
60 cm3
d)
80 cm3
16.
Both X and Y are elements in Period 3 of the eriodic table. Both these elements are solids at room temperature and pressure. Which of the following statements is true if the electronegativity of X is triple that of element Y?
a)
The radius of ion X is larger than the radius of ion .
b)
Element X is chemically more reactive than Y.
c)
Elements X has higher electrical conductivity than Y.
d)
The oxide of X has a higher melting point than the oxide of Y.
17.
Which element in the third period forms an oxide with the highest oxidation number?
a)
chlorine
b)
aluminium
c)
silicon
d)
sulphur
18.
An element W is located in the third period. Its valence electron configuration is s2p4. Which of the following compounds will not be formed by W?
a)
HW
b)
WF6
c)
WO3
d)
CuW
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