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WorksheetsPeriodic Classification
Total questions: 25
Worksheet time: 17mins
The number of periods and groups in the
periodic table are______.
6,16
7,17
8,18
7,18
_____ group contains the member of
halogen family.
17th
15th
18th
16th
Chemical formula of rust is ________.
FeO.xH2O
FeO4.xH2O
Fe2O3.xH2O
FeO
If the distance between two Cl atoms in Cl2
molecule is 1.98Å, then the radius of Cl
atom is ________.
0.99 Å
0.09 Å
0.90 Å
0.98 Å
Dobereiner tried to arrange the elements with similar properties into group. So, he called the groups “_______”
Octaves
Octaves
Triad
Metals
Non-Metals
Cl, I if these are the Dobereiner’s triad and the atomic masses of chlorine and the Iodine are 35,5 and 127 respectively. The atomic mass & the particular element is?
Ar, 40
F,19
Br, 81.25
At, 210
What happens to the electropositive character of elements on moving from left to right in a periodic table?
Increases
Decreases
First increases than decreases
First decreases than increases
The electronic configuration of an element M is 2, 8, 4. In modern periodic table, the element M is placed in
4 group
2 group
14 group
18 group
Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen?
O < F < N
N < F < O
O < N < F
F < O < N
An element M is in group 13th of the periodic table, the formula for its oxide is
MO
M2O3
M3O2
None
Atoms of elements in group 1 have ____________.
one electron in their outermost energy level
two electrons in their outermost energy level
seven electrons in their outermost energy level
eight electrons in their outermost energy level
Table shows the arrangement of electrons of elements in Period 3 of the Periodic Table. Which one of the following shows the correct descending order of their atomic radii?
M,L,N,P,K
L,M,N,K,P
P,K,N,M,L
K,L,M,N,P
2
3
5
7
The period number tells us...
How many electron shells an element has
How many electrons are in the most outer shell
The mass number
The valency
Which model represents the most reactive atom?
Newlands could classify elements only upto
Copper.
Chlorine.
Calcium.
Chromium.
According to the periodic Law of elements, the variation in properties of elements is related to their
nuclear masses.
atomic number.
nuclear neutron-proton number ratios.
atomic masses.
Noble gases were included in Mendeleev's periodic table in the
1st Group.
7th Group.
8th Group.
None of these
The chemical properties of calcium
(20 Ca) are similar to those of .......................
19K
12Mg
25Mn
3Li
Which of the following is the outermost shell for elements of period 2 ?
K
L
M
N
EKABORON , EKA ALUMINIUM AND EKA SILICON REPRESENT WHICH OF THE FOLLOWING SETS OF ELEMENTS?
SCANDIUM,GALLIUM,GERMANIUM
GERMANIUM, SCANDIUM,GALLIUM,
GALLIUM,SCANDIUM ,GERMANIUM
GALLIUM,GERMANIUM, SCANDIUM
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
MO
M2O
MO2
M2O3
An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?
Group 1
Group 3
Group 2
Group 4
1.Newlands relation is called
a) Musical Law
(b) Law of Octaves
(c) Periodic Law
(d) Atomic Mass Law
