Solution By Steps

Step 1: Lewis Structure

To determine the molecular geometry of ClO3, first, we need to draw the Lewis structure of ClO3.

Step 2: Count Valence Electrons

Chlorine contributes 7 valence electrons, and each oxygen contributes 6 valence electrons. There are 3 oxygen atoms in ClO3.

Total valence electrons = 7 (Cl) + 6 (O) * 3 = 25

Step 3: Lewis Structure of ClO3

Place Cl in the center, surrounded by 3 O atoms. Each O is single-bonded to Cl, and there are 2 lone pairs on each O.

The Lewis structure is:

\left(\begin{array}{lll}

Cl & O & O \\

| & | & | \\

O & Cl & O \\

\end{array}\right)

Step 4: Determine Electron Pair Arrangement

In ClO3, there are 4 electron groups around the central Cl atom (3 single bonds and 1 lone pair).

Step 5: Molecular Geometry

With 4 electron groups, the molecular geometry of ClO3 is tetrahedral.

Final Answer

The molecular geometry of ClO3 is tetrahedral.

Key Concept

Molecular Geometry

Key Concept Explanation

Molecular geometry describes the arrangement of atoms in a molecule, considering both bonding and lone pairs. It helps predict the physical and chemical properties of substances.