Question

In 3–4 sentences, predict how phosphorus and chlorine would bond. Explain why they would bond that way. Please make your answer simple, coherent, and intended for 10th grade.

Answer 1

Phosphorus has five valence electrons and chlorine has seven, so chlorine wants one more electron to complete an octet while phosphorus can share electrons. They bond by forming covalent bonds, commonly making PCl3 (three Cl atoms) or PCl5 (five Cl atoms) depending on conditions. The bonds are polar covalent because chlorine is more electronegative and pulls the shared electrons toward itself. Phosphorus can make three or five bonds because, as a third‑period element, it can expand its valence shell to accommodate more shared electrons.