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 |
 86%
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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 |
 88%
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Boron has lesser ionization enthalpy than Beryllium, because:

1.  It is easier to remove electrons from p - a subshell than a filled s - subshell.
2.  The s-electron can be removed easier than the p-electron.
3.  Ionization enthalpy decreases with an increase in atomic number.
4.  Ionization enthalpy increases along the period.

Subtopic:  Ionization Energy (IE) |
 84%
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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 |
 85%
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The group number that has non-metal, liquid as well as gas at room temperature is:

1. 15 2. 14
3. 18 4. 17
Subtopic:  Modern Periodic Table & Periodicity |
 56%
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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) |
 67%
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Among the following elements, identify the one that is not an actinoid :

1. Curium (Z=96) 2. Californium (Z=98)
3. Uranium (Z=92) 4. Terbium (Z=65)
Subtopic:  Modern Periodic Table & Periodicity |
 86%
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The order of screening effect of electrons of s, p, d and f orbitals of a given shell of an atom on electrons in its outer shell is :

1. s > p > d > f

2. f > d > p > s

3. p < d < f < s

4. f > p > s > d

Subtopic:  Screening Effect |
 93%
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The first ionisation enthalpies of Na, Mg, Al, and Si are in the order of:

1. Na < Al < Mg < Si

2. Na > Mg > Al > Si

3. Na < Mg < Al < Si

4. Na > Mg > Al < Si

Subtopic:  Ionization Energy (IE) |
 66%
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Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is:

1. F > Cl > Br > I 2. F < Cl < Br < I
3. F < Cl > Br > I 4. F < Cl < Br > I
Subtopic:  Electron Affinity (EA) |
 82%
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