Question # 1

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

.................... of an atom is not fixed.

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Size

Mass

Electronegativity

Nuclear char

N consist of ________________ sub shells.

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4

1

2

0

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

Modern periodic table can be classified into ________________.

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Elements

s, p, d, f blocks

Periods

ROWS

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

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1

6

7

8

The atomic radil of the elements in periodic table:

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increase form left to right in period

increase form top to bottom

do not change form left to right in period

decrease form top to bottom in a group

Mendeleev periodic table was based upon the:

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electronic configuration

atomic mass

atomic number

completion of a subshell

The modern periodic table is based on:

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Atomic number

Mass number

Relative mass

Nil

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

The no. of periods in modern periodic table are

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7

11

18

23

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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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