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प्रश्न
The group of elements in which the differentiating electron enters the anti penultimate shell of atoms are called ________.
विकल्प
p-block elements
d-block elements
s-block elements
f-block elements
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उत्तर
The group of elements in which the differentiating electron enters the anti penultimate shell of atoms are called f-block elements.
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संबंधित प्रश्न
Various successive ionisation enthalpies (in kJ mol-1) of an element are given below.
| IE1 | IE2 | IE3 | IE4 | IE5 |
| 577.5 | 1,810 | 2,750 | 11,580 | 14,820 |
The element is
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Energy of an electron in the ground state of the hydrogen atom is −2.18 × 10−18 J. Calculate the ionisation enthalpy of atomic hydrogen in terms of kJ mol−1.
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Explain the following, give an appropriate reason.
First ionisation potential of the C-atom is greater than that of the B atom, whereas the reverse is true is for the second ionisation potential.
State the trends in the variation of electronegativity in groups and periods.
