Question # 1

4th & 5th consist of ________________ elements.

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8

18

32

infinite

The repetition of a property after a certain interval is:

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Periodicity

Properties

Periodicity of properties

None

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

Which of following does not belong to p-block?

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IIIA

IVA

VA

VIB

In period, ionization energy of elements

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Increases

Decreases

Remains constant

None of these

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

________________ is the shortest period.

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6th

8th

2nd

1st

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

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

The vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

The periodic table consist of ________________ columns.

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Periods

Rows

Column

Nil

________________ elements were discovered in year 1800.

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34

35

36

37

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

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Bohr

Rutherford

Mendeleev's

Nil

Li belongs to ________________ block.

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s

p

d

f

.................... of an atom is not fixed.

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Size

Mass

Electronegativity

Nuclear char

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