<Tr> <Td> 15 </Td> <Td> </Td> <Td> Phosphorus </Td> <Td> Polyatomic nonmetal </Td> <Td> (Ne) 3s 3p </Td> </Tr> <Tr> <Td> 16 </Td> <Td> </Td> <Td> Sulfur </Td> <Td> Polyatomic nonmetal </Td> <Td> (Ne) 3s 3p </Td> </Tr> <Tr> <Td> 17 </Td> <Td> Cl </Td> <Td> Chlorine </Td> <Td> Diatomic nonmetal </Td> <Td> (Ne) 3s 3p </Td> </Tr> <Tr> <Td> 18 </Td> <Td> Ar </Td> <Td> Argon </Td> <Td> Noble gas </Td> <Td> (Ne) 3s 3p </Td> </Tr>

Why silicon has the highest melting point in period 3