Moderate

In a period the atomic radii:

Correct answer: C. decrease

  • A. increase.
  • B. remain same.
  • C. decrease
  • D. first increase, then decrease.

Explanation

Along the period, the number of shells remain same and the attraction of nucleus towards outermost electrons increase with increase in proton number. Therefore, size of atom decreases.

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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.

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