Covalent Compounds Unit 6: Nomenclature - Part II Mrs. Callender

How do I name a covalent compound? Lesson Essential Questions: How do I write a formula for a covalent compound?

Writing Names of Binary Molecular Compounds Ex. P 2 O 5 1. BM compounds use prefixes in their name. These are determined by the subscripts in the formula. 1 – mono 2 – di 3 – tri4 – tetra 5 – penta 6 – hexa 7 – hepta8 – octa 9 – nona10 - deca penta You know it is a Binary Molecular Compound because it contains two elements and both are nonmetals. di 2. Write the name of the first element after the prefix. phosphorus 3. Write the prefix of the second element.

Writing Names of Binary Molecular Compounds Ex. S 2 O BM compounds use prefixes in their name. These are determined by the subscripts in the formula. 1 – mono 2 – di 3 – tri4 – tetra 5 – penta 6 – hexa 7 – hepta8 – octa 9 – nona10 - deca deca di 2. Write the name of the first element after the prefix. sulfur 3. Write the prefix of the second element.

Writing Binary Covalent Formulas Ex. Nitrogen Trihydride 1.Write the formula for the first and second element. NH 2. Write subscripts for the prefixes in the name. 3

Writing Binary Covalent Formulas Ex. Diarsenic Pentaoxide 1.Write the formula for the first and second element. AsO 2. Write subscripts for the prefixes in the name. 5 2