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Classification of Elements and Periodicity in Properties
How does electron gain enthalpy vary along a period?
The electron gain enthalpies of elements become more negative along a period. This is because as we move across a period, the atomic size decreases and effective nuclear charge increases. Both these factors result in greater attraction for the incoming electron. Hence electron gain enthalpy increases in a period from left to right.
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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 ?
What are the advantages of periodic classification of elements?
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