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Classification of Elements and Periodicity in Properties
How does electron gain enthalpy vary along a group?
The electron gain enthalpy of elements become less negative as we move from top to bottom down a group. This is because on moving down a group, there is the simultaneous increase in atomic size and nuclear charge. However, the effect of the increase in size is greater than the increase in nuclear charge. As a result, the incoming electron feels lesser attraction by the large atom. Consequently, electron gain enthalpy becomes less negative down a group.
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Which property is the basis of long form of periodic table?
How many elements are placed in each period of the p-block?
What is the number of groups in: (i) p-block (ii) d-block?
How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?
What is the name given to the s-block elements?
To which block the element with outer electronic configuration 4s23d10 belongs?
Why are there 10 elements in each series of d-block?
In terms of electronic configuration,
what is common in a given period and group?
Give the general electronic configuration of
(i) Transition elements (ii) Inner transition elements.
Name the group and period to which an element with Z = 15 belongs ?
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