Question # 1

Mendeleev periodic table was based upon the:

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electronic configuration

atomic mass

atomic number

completion of a subshell

The atomic number of potassium is:

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11

15

18

19

The no. of electrons in the valence shell of alkali metals is

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1

2

4

7

Mark the incorrect statement about ionization energy:

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it is measured in Kjmol^-1

it is absorption of energy

it decreases in period

it decreases in a group

4th & 5th consist of ________________ elements.

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8

18

32

infinite

An ________________ scientist arranged the elements in order in periodic table.

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English

Italian

African

Indian

The no.of electrons in the valence shell of noble gases is

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1

6

7

8

The periodic table consist of ________________ columns.

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Periods

Rows

Column

Nil

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

N consist of ________________ sub shells.

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4

1

2

0

The 2nd and third periods are called

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short period

Normal period

Long period

Very long period

The right most position in the periodic table is occupied by:

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

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9th Class Chemistry Chapter 3 Periodic Table and Periodicity of Properties English Medium KPK Boards Online Mcqs MCQs With Answers

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