Which statement is true?

1. The electronegative nature of elements increases along the period

2. The electropositive nature of elements increases along the period

3. The chemical reactivity of elements increases along the period

4. The I.E  of element decreases along the period

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Which of the electronic configuration of an atom has the lowest ionization enthalpy? 

1. 1s2,2s22p5

2. 1s2,2s22p3

3. 1s2,2s22p6,3s1

4. 1s2,2s22p6

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Amongst the following electronic configurations, the highest ionization energy
is represented by:

1. [Ne]3s23p3

2. [Ne]3s23p2

3. [Ar]3d104s24p3

4. [Ne]3s23p1

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Element that has the greatest tendency to lose an electron is :

1. F 2. Fr
3. S 4. Be
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In the long form of periodic table, the elements having lowest ionization potential are placed in:

1. I group

2. IV group

3. VII group

4. Zero group

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Four successive members of the first-row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?

1. Vanadium (Z = 23)

2. Chromium (Z = 24)

3. Iron (Z = 26)

4. Manganese (Z = 25)

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The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is

1. C > N > O > F

2. O > N > F > C

3. O > F > N > C

4. F > O > N > C

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Generally, the ionization enthalpy increases along a period but there are some exceptions. The one which is not an exception is-

1. Be and B

2. N and O

3. Mg and Al

4. Na and Mg

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The First ionisation enthalpies of Na,Mg,Al and Si are in the order

1. Na<Mg>Al<Si

2. Na>Mg>Al>Si

3. Na<Mg<Al<Si

4. Na>Mg>Al<Si

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Which one of the elements has the highest ionization energy?

1. [Ne]3s23p1

2. [Ne]3s23p2

3. [Ne]3s23p3

4. [Ar]3d104s24p2

 

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