Periodic Classification and Periodic Properties 2 Question 20
20. The electronegativity of the following elements increases in the order
(1987, 1M)
(a) $\mathrm{C}, \mathrm{N}, \mathrm{Si}, \mathrm{P}$
(b) $\mathrm{N}, \mathrm{Si}, \mathrm{C}, \mathrm{P}$
(c) $\mathrm{Si}, \mathrm{P}, \mathrm{C}, \mathrm{N}$
(d) P, Si, N, C
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Answer:
Correct Answer: 20. (a)
Solution:
- Electronegativity increases from left to right in a period and decreases from top to bottom in a group. Variation is more rapid in group than in a period, hence the desired order is Electronegativity : $\mathrm{Si}<\mathrm{P}<\mathrm{C}<\mathrm{N}$
