Question # 1

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

4th & 5th consist of ________________ elements.

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8

18

32

infinite

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

Li belongs to ________________ block.

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s

p

d

f

The number of periods is:

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6

7

8

9

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

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1

6

7

8

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 atomic number of potassium is:

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11

15

18

19

The no. of periods in modern periodic table are

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7

11

18

23

In period, ionization energy of elements

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Increases

Decreases

Remains constant

None of these

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

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

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