Which molecule has a trigona planar shape? carbon monoxide boron trichloride silicon tetraiodide carbon tetrafluoride

## Step 1<br />The shape of a molecule is determined by the arrangement of its electron pairs. The electron pairs in a molecule are arranged in a way that minimizes the repulsion between them. This is known as the VSEPR (Valence Shell Electron Pair Repulsion) theory.<br /><br />## Step 2<br />Carbon monoxide (CO) has a linear shape. This is because it has only two atoms, and the electron pairs are arranged in a straight line.<br /><br />## Step 3<br />Boron trichloride (BCl3) has a trigonal planar shape. This is because it has three atoms, and the electron pairs are arranged in a plane with 120-degree angles between them.<br /><br />## Step 4<br />Silicon tetraiodide (SiI4) has a tetrahedral shape. This is because it has four atoms, and the electron pairs are arranged in a tetrahedron.<br /><br />## Step 5<br />Carbon tetrafluoride (CF4) also has a tetrahedral shape. This is because it has four atoms, and the electron pairs are arranged in a tetrahedron.