Question # 1

Th name of chemist who arranged all the elements in the periodic tale is :

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J.Newlands

Columb

Einstine

None of these

The amount of energy given out when an electron is added to any atom is called:

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lattice energy

ionization energy

electronegative

electron affinity

The elements of group 3 to 12 are called

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Normal elements

Transition elements

Radioactive elements

None of these

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

The modern periodic table is based on:

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Atomic number

Mass number

Relative mass

Nil

The no. of periods in modern periodic table are

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7

11

18

23

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

The number of periods is:

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6

7

8

9

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

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 alkali metals is

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1

2

4

7

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

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1

6

7

8

The repetition of a property after a certain interval is:

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Periodicity

Properties

Periodicity of properties

None

Li belongs to ________________ block.

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s

p

d

f

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

Which element has highest electronegativity?

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CI

F

Br

I

In period, ionization energy of elements

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Increases

Decreases

Remains constant

None of these

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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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