Phosphorous (P) and chlorine (Cl) bond covalently to form the important industrial compound phosphorous trichloride. The diagrams below show the electron structures of phosphorous and chlorine. On left, a purple circle labeled P surrounded by 3 concentric circles. The inner circle has 2 small green spheres. The second circle has 8 small green spheres. The third circle has 5 small green spheres. On right, a purple circle labeled C l surrounded by 3 concentric circles. The inner circle has 2 small green spheres. The middle circle has 8 small green spheres. The outer circle has 7 small green spheres. Which diagram shows how the covalent bonds most likely form in a phosphorous trichloride molecule? At center, P connected above by 2 lines to C l with 2 dots each on right, left, top. Also connected by 1 line at left to C l with 2 dots each above, below, left. Also connected by 1 line at right to C l with 2 dots each above, below, right. At center, P connected above by 2 lines to C l with 2 dots each on right, left, top. Also connected by 2 lines at left to C l with 2 dots each above, left. Also connected by 2 lines at right to C l with 2 dots each above, right. At center, P connected above by 1 line to C l with 2 dots each on right, left, top. Also connected by 1 line at left to C l with 2 dots each above, below, left. Also connected by 1 line at right to C l with 2 dots each above, below, right. P also has 2 dots below. At center, P connected above by 2 lines to C l with 2 dots each on right, left, top. Also connected by 1 line at left to C l with 2 dots each above, below. Also connected by 1 line at right to C l with 2 dots each above, below.

We know that a molecule is made up of atoms, the atoms that make up a molecule are arranged in a definite pattern. The pattern that these atoms are arranged along with the positioning of electron pairs around the central atom is what determines the shape of the molecule.

Now we know that the phosphorous trichloride molecule is composed of one atom of phosphorus and three atoms of chlorine which are all held by covalent bonds.

The chlorine atoms are all arranged around the phosphorus central atom in a trigonal pyramidal geometry. The small green spheres shows the electrons that surround the chlorine atom.

The correct structure of the phosphorous trichloride have been shown in the image attached to this answer.

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