CHE 106 Lecture Notes - Lecture 4: Dmitri Mendeleev, Chemical Formula, Empirical Formula

• School: Syracuse University
• Department: Chemistry
• Course: CHE 106
• Professor: J.French

Document Summary

H h: h c c o h. H h: molecular formula indicate exact number of each element, empirical formula lowest whole number ratio of elements in a molecule. The number of carbon atoms is listed first, the number of hydrogen atoms listed second, the number of all other elements are then listed in alphabetical order: 2. If there is no carbon in the molecule, then just list all the elements alphabetically (even hydrogen: examples with molecular/empirical formulas: Empirical: ch2o: organic vs. inorganic, organic compounds any compound containing carbon, usually bonded to hydrogen, oxygen, nitrogen. Inorganic any compound that does not contain carbon. Ionic compounds: molecular compounds are composed of elements covalently bonded together (organic/inorganic) Ionic compounds are ions held together by ionic bonds. Ion any element through gaining or lost electrons. Na+, k+ 2a mg2+ ca2: the charge on a monatomic anion for a nonmetal equals the group number minus 8.