Question # 1

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

The number of periods is:

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6

7

8

9

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

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Size

Mass

Electronegativity

Nuclear char

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

The modern periodic table is based on:

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Atomic number

Mass number

Relative mass

Nil

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

Li belongs to ________________ block.

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s

p

d

f

Group runs from ________________

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Top to bottom

Left to right

Top to right

Bottom to left

The repetition of a property after a certain interval is:

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Periodicity

Properties

Periodicity of properties

None

N consist of ________________ sub shells.

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4

1

2

0

________________ elements were discovered in year 1800.

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34

35

36

37

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 right most position in the periodic table is occupied by:

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

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

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

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Bohr

Rutherford

Mendeleev's

Nil

The no. of periods in modern periodic table are

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7

11

18

23

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

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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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