Question # 1

Which element has highest electronegativity?

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CI

F

Br

I

D-block consists of:

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4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

The vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

Transition elements are:

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all gases

all metals

all non-metals

all metalloids

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

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Size

Mass

Electronegativity

Nuclear char

The atomic number of potassium is:

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11

15

18

19

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

The repetition of a property after a certain interval is:

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Periodicity

Properties

Periodicity of properties

None

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

N consist of ________________ sub shells.

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4

1

2

0

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

The number of periods is:

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6

7

8

9

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

4th & 5th consist of ________________ elements.

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8

18

32

infinite

The no. of periods in modern periodic table are

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7

11

18

23

The modern periodic table is based on:

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Atomic number

Mass number

Relative mass

Nil

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

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

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

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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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