Question # 1

The no.of elements in the first period is

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2

8

18

23

________________ is the shortest period.

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6th

8th

2nd

1st

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

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1

6

7

8

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

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

Group runs from ________________

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Top to bottom

Left to right

Top to right

Bottom to left

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 vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

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

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

4^th and 5^th period of the long form of periodic table are called

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short periods

Normal periods

Long periods

Very long periods

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

4th & 5th consist of ________________ elements.

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8

18

32

infinite

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

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Bohr

Rutherford

Mendeleev's

Nil

The atomic number of potassium is:

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11

15

18

19

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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Chemistry 9th Class English Medium Unit 3 Online Test MCQs With Answers

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