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 |
 55%
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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) |
 66%
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Among the following elements, the one that is not an actinoid is:

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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The period number in the long form of the periodic table is equal to : 

1. Magnetic quantum number of any element of the period.
2. Atomic number of any element of the period.
3. Maximum principal quantum number of any element of the period.
4. Maximum azimuthal quantum number of any element of the period.

Subtopic:  Modern Periodic Table & Periodicity |
 79%
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