Increasing order of electronegativity of the elements is -

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  1. N, Si, C, P
  2. Si, P, C, N
  3. C, N, Si, P
  4. P, Si, C, N

Answer (Detailed Solution Below)

Option 2 : Si, P, C, N
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CONCEPT:

Electronegativity

  • Electronegativity is a measure of an atom's ability to attract and hold electrons in a chemical bond.
  • Electronegativity increases across a period from left to right due to an increase in nuclear charge with a relatively constant shielding effect.
  • Electronegativity decreases down a group as the atomic size increases, reducing the nucleus's ability to attract bonding electrons.

EXPLANATION:

  • Phosphorus (P) has the lowest electronegativity among the given elements as it is lower in the periodic table compared to the others.
  • Silicon (Si) is next, as it is also lower on the periodic table than Carbon (C) and Nitrogen (N), which are in the same period but have higher electronegativities.
  • Carbon (C) has higher electronegativity than Si and P but lower than Nitrogen.
  • Nitrogen (N) has the highest electronegativity among the given elements, located in the upper right of the periodic table.

CONCLUSION:

The correct answer is  Si,P, C, N.

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