Classification of Elements and Periodicity in Properties Test

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Classification of Elements and Periodicity in Properties Test - 16

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is the correct electronic configuration of potassium?

A
2, 8, 9

B
8, 2, 9

C
2, 8, 8, 1

D
1, 2, 8, 8

Solution

The atomic number of potassium is 19. K shell will have 2 electrons. L shell will contain 8 electrons. M shell will also have 8 electrons and the remaining one electron will be in N shell.
Question 2
1 / -0

Elements which have fully filled valence shell belong to :

A
halogens

B
noble gas

C
chalcogens

D
alkali

Solution

Noble gas has fully filled valence shell electrons as these belongs to stable configurations.
Question 3
1 / -0

The horizontal rows in Mendleev's table were called :

A
groups

B
rows

C
periods

D
none of the above

Solution

The horizontal rows in Mendleev's table were called periods. There are seven periods in Mendeleev's periodic table.
Question 4
1 / -0

The vertical columns in Mendeleev's table were called :

A
verticals

B
periods

C
columns

D
groups

Solution

The vertical columns in Mendeleev's table were called groups. There are $$8$$ groups in Mendeleev's periodic table.
Question 5
1 / -0

The correct electronic configuration of element having mass number 24 and number of neutrons 12 is

A
2,8,1

B
2,8,2

C
2,8

D
2,8,3

Solution

No. of protons = mass number-number of neutrons $$= 24-12=12$$ that is equal to number of electrons. K shell will have 2 electrons. L shell will have 8 electrons. M shell will have 2 electrons.
Question 6
1 / -0

The groups from $$1^{st}$$ to $$7^{th}$$ of Mendeleev's periodic table were divided into ______ subgroups.

A
$$2$$

B
$$3$$

C
$$4$$

D
$$1$$

Solution

The groups from $$1$$st to $$7$$th of Mendeleev's periodic table were divided into two subgroups A and B.
Question 7
1 / -0

Halogens are put in the periodic table in :

A
zero group

B
VA group

C
IA group

D
VIIA group

Solution

Halogens are put in the periodic table in VIIA group.
Question 8
1 / -0

An inert gas with more than one orbit, has ____ electrons in its outermost shell.

A
0

B
2

C
4

D
8

Solution

Helium $$=$$ 2 ; Neon $$=$$ 2,8 ; Argon $$=$$ 2,8,8 ; Krypton $$= $$2,8,18,8 ; Xenon $$=$$ 2,8,18,18,8 ; Radon$$=$$2,8,18,32,18,8. All have completely filled electrons with valence electron 8.
Question 9
1 / -0

The eighth group of Mendeleev's periodic table is divided into how many subgroups?

A
$$2$$

B
$$0$$

C
$$4$$

D
$$1$$
Solution
In Mendeleev's, periodic table groups were divided into two subgroups.
Groups from $$I\,to\, VII$$ are meant for normal elements, and group $$VIII$$ is for transition elements.
Groups $$I \,to \,VII$$ have been divided into two subgroups while group $$VIII$$ is meant for three elements.
So the eighth group in Mendeleev's periodic table was not divided into any group.
Option $$B$$ is correct.
Question 10
1 / -0

Outermost shell cannot have more than ....... electrons.

A
2

B
4

C
6

D
8

Solution

Since s and p orbitals of the outermost shell are filled before d and f orbitals of inner orbitals, outermost shell can have the maximum of sum of the capacities of s and p orbitals i.e. 8 .

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Classification of Elements and Periodicity in Properties Test - 16

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Classification of Elements and Periodicity in Properties Test - 16

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Question 1

2, 8, 9

8, 2, 9

2, 8, 8, 1

1, 2, 8, 8

Solution

Question 2

halogens

noble gas

chalcogens

alkali

Solution

Question 3

groups

rows

periods

none of the above

Solution

Question 4

verticals

periods

columns

groups

Solution

Question 5

2,8,1

2,8,2

2,8

2,8,3

Solution

Question 6

$$2$$

$$3$$

$$4$$

$$1$$

Solution

Question 7

zero group

VA group

IA group

VIIA group

Solution

Question 8

0

2

4

8

Solution

Question 9

$$2$$

$$0$$

$$4$$

$$1$$

Solution

Question 10

2

4

6

8

Solution

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