The correct order of metallic character of elements B, Al, Mg and K  is :

1. B > Al > Mg > K

2. Al > Mg > B > K

3. Mg > Al > K > B

4. K > Mg > Al > B

Subtopic:  Nature of Compound |
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Considering the elements B, C, N, F, and Si; the correct order of their non-metallic character is :

1. B > C > Si > N > F

2. Si > C > B > N > F

3. F > N > C > B > Si

4. F > N > C > Si > B

Subtopic:  Nature of Compound |
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The correct order of their chemical reactivity of the elements F, Cl, O and N in terms of oxidizing property is :

1. F > Cl > O > N

2. F > O > Cl > N

3. Cl > F > O > N

4. O > F > N > Cl

Subtopic:  Nature of Compound |
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The maximum number of elements that can be accommodated in the sixth period are :

1.  8

2. 18

3. 32

4 16

Subtopic:  Electronic Configuration |
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The element named after Lawrence Berkeley Laboratory is 

1. Seaborgium

2. Lawrencium

3. Moscovium

4. Hafnium

Subtopic:  Modern Periodic Table & Periodicity |
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 B has lesser ionization enthalpy than Be, because -

1. It is easier to remove electrons from p - subshell than completely filled s - subshell.

2. The s-electron can be removed easier than the p electron.

3. Ionisation enthalpy decreases with an increase in atomic number.

4. Ionisation enthalpy increases along the period.

Subtopic:  Ionization Energy (IE) |
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Difference between electron gain enthalphy and electronegativity is described by

1) Valence electrons

2) Atomic size

3) Atomic radii

3) Atomic number

Subtopic:  Electronegativity | Electron Affinity (EA) |
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Incorrect statement about metal is -
1. Metals can donate electrons.
2. Metals form ionic compounds.
3. Metals are more electronegative.
4. Metals have less ionization energy.

Subtopic:  Nature of Compound |
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The group number that has metal, non-metal, liquid as well as gas at room temperature, is -

1. 15

2. 14

3. 18

4. 17

Subtopic:  Modern Periodic Table & Periodicity |
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Elements H1    H2    egH
    I    520   7300    -60
    II    419    3051   -48
   III    1681    3374   -328
   IV    1008   1846    -295
    V     2372     5251    +48
   VI      738     1451    -40
The least reactive element based on the above data is :
1. III
2. IV
3. II
4. V
Subtopic:  Ionization Energy (IE) | Electron Affinity (EA) |
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