Question # 1

How many elecntrons are present in the valence shell of group 1 elements.

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1

2

3

4

Actinide series starts after the element

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Actinium

Lanthanum

Osmum

Silver

Period nuebr tells abou the

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No. of valance electrons

No. of electronic shells

Both a and b

None of the above

Electronegativity of oxygen is.

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3,1

3,3

3.4

3,2

Mark the icorrect statement about ionization energy.

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It is measured in kJmol-1

It is absorption of energy

It decreased in a period

It decrese in a group

The elementss of group 1 and 2 are placed in which block

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s

p

d

f

Whcih period of the modern periodic table is considered as incomplete period.

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4th

5th

6th

7th

Which of the following is a metal

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Magnesium

Carbon

Hydrogen

Nitrogen

Second and third periods are called

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1st transition series

Normal periods

2nd transiion series

3rd transiliton serios

Whic period of the moden periodic table is condidered as incommplete period.

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5th

4th

7th

6th

Transition elements are

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All gases

All non metals

All Metals

All metalloids

The elements of group 3 to 12 are clled.

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Normal elements

Halogens

Noble gases

Transition elements

The distance between the neclei of two carbon atoms in its elemetnal from is

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150 pm

152 pm

154 pm

156 pm

Atomic number of actinium is

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57

60

89

80

The elements of a group show properties.

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Same

Different

Both a and b

None of these

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