Question # 1

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 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 periodic table consist of ________________ columns.

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Periods

Rows

Column

Nil

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

Li belongs to ________________ block.

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s

p

d

f

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

Mendeleev periodic table was based upon the:

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electronic configuration

atomic mass

atomic number

completion of a subshell

________________ is the shortest period.

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6th

8th

2nd

1st

D-block consists of:

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4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

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