BIO 1130 Lecture Notes - Fluorine, Molar Concentration, Picometre

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

1 amu (atomic mass unit) = 1. 66054 x 10-24 g. 1 pm (picometer) = 1 x 10-12 m. 1 (angstrom) = 1 x 10-10 m = 100 pm = 1 x 10-8 cm. Rutherford atoms contain a positively charged nucleus. Most chemical properties result from the # and arrangement of electrons. Cations have fewer electrons than protons so are positively charged. e. g. na+ Molecular formula: shows the exact # and ratio of each element. Structural formula: shows how atoms are bonded together using a line to represent a bond. Empirical formula: shows the simplest whole # ratio of elements. Oxidation rules: the oxidation number, nox, for a free elements (not in a compound) is zero. e. g. na nox = 0. Al nox = 0: the oxidation number of a monatomic ion (ion composed of only 1 atom) is equal to the ion charge: e. g. na+ nox = +1.