Question # 1

Main group elements are arranged in ..............groups.

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7

6

8

10

How many periods are presnet in the modern periodic table.

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7

8

10

12

When we mvoe form left to right in a period, atomic size.

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Increases

Decreases

First increases then decreased

None of the above

All metals bear

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Positive charge

Negative charge

Both a and b

None of these

Metals can form ions carrying carges.

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Uni positive

Di positive

Tri postive

All of these

The elements of group 3 to 12 are clled.

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Normal elements

Halogens

Noble gases

Transition elements

Actinidws belong to period.

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4th

5th

6th

7th

Which is the softtest metal.

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Zn

Ca

Na

Al

How many electrons can nitrogen accept in its outermost shell.

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2

3

4

5

Unit of atomic size is

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pm

nm

kJmol-1

Both a and b

Which element is the most reactive element?

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Florine

Oxygen

Chlorine

Nitrogen

Electron affinity of fluorine in kJmol-1 is

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-328

328

-330

-340

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