1. Chapter 6 Section 5 Binary Molecular Compounds -made up of two non-metals Ex- CO, CO 2, CCℓ 4 -to name molecular compounds you use prefixes

2. Prefix# (subscript) mono-1 di-2 tri-3 tetra-4 penta-5 hexa-6 hepta-7 octa-8 nona-9 deca-10

3. Naming Molecular Compounds -look at subscript of each element and give each element a prefix -if first element has a 1 as the subscript, then it does not get a prefix (omit mono-) -second element gets prefix and ends in –ide -if element begins with a vowel, drop the vowel at the end of a prefix **when writing formulas for molecular compounds you DO NOT reduce subscripts

4. Try these!! carbon monoxide CO carbon tetrachloride CCℓ 4 sulfur trioxide SO 3 tetraiodine nonoxide I4O9I4O9 phosphorus pentafluoride PF 5

5. N 2 O PCℓ 3 SF 6 OF 2 CℓO 8 NF 3 S 2 Cℓ 2 N 2 O 4

6. dinitrogen monoxide phosphorous trichloride sulfur hexafluoride oxygen difluoride chlorine octoxide nitrogen trifluoride disulfur dichloride dinitrogen tetroxide

7. Acids -acids are compounds dissolved in water -will have (aq) after the formula which means aqueous or dissolved in water -always begin with hydrogen (H) Ex- HCℓH 2 SO 4 H 3 PO 3 Naming Acids -you must look at what follows the hydrogen

8. -if it is a single element (ends in –ide), then you use prefix hydro-, root of the element, -ic ending and the word acid ex- HCℓ hydrochloric acid -if what follows hydrogen ends in –ite, you just add –ous ending to root of the polyatomic ion and add acid ex- H 3 PO 3 phosphorous acid

9. -if what follows hydrogen ends in –ate, you just add –ic ending to root of the polyatomic ion and add acid ex- H 2 SO 4 sulfuric acid Try these!! HI hydroiodic acid H2SH2S hydrosulfuric acid H 2 CO 3 carbonic acid

10. sulfurous acid H 2 SO 3 nitrous acid HNO 2 chloric acid HCℓO 3