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WorksheetsPERIODIC CLASSIFICATION OF ELEMENTS
Total questions: 20
Worksheet time: 14mins
Newlands relation is called
Musical Law
Law of Octaves
Periodic Law
Periodic Law
Upto which element, the Law of Octaves was found applicable?
Oxygen
Calcium
Cobalt
Potassium
In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?
Chlorine
Silicon
Oxygen
Germanium
At the time of Mendeleev, the number of elements known was
63
65
62
64
An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?
4th group
6th group
3rd group
2nd group
The arrangement of elements in the Modem Periodic Table is based on their
increasing atomic mass in the period
increasing atomic number in the horizontal rows
increasing atomic number in the vertical columns
increasing atomic mass in the group
Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
Group 8
Group 2
Group 18
Group 10
Element ‘X’ forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:
Si
Mg
Al
Na
Which of these belong to the same period?
ELEMENT A B C
ATOMIC NUMBER 2 10 5
A, B
B, C
C, A
A, B and C
Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If atomic number of carbon is 6, the atomic number of silicon is
7
14
24
16
What is the atomic number of element of period 3 and group 17 of the Periodic Table?
10
4
17
21
Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?
The oxides become more acidic
The elements become less metallic
There is an increase in the number of valence electrons
(d) The atoms lose their electrons more easily
The elements A, B and C belong to groups 1, 14 and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
A and B
A and C
B and C
None
An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.
XY2
XY
X2Y
(XY)2
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
MO
M2O
M2O3
MO2
Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-.
Helium
Argon
Neon
Krypton
The atom of an element has electronic con-figuration 2, 8, 7. To which of the following elements would it be chemically similar?
N(7)
P(15)
Na(11)
F (9)
Halogens belong to group ……… of the Periodic Table.
17
18
16
15
Consider the following elements
20Ca, 8Or 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be in group 16 of the Periodic Table?
20Ca and 16S
20Ca and 8O
18Ar and 16S
8O and 16S
The concept of grouping elements into triads was given by ……… .
Dobereiner
Newland
Mendeleev
None of the above
