BIOL 112 Lecture : BIOL 112 Lecture Notes Part 1.doc

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Joseph Dent

Document Summary

The below is mostly review of basic chemistry. Mass of proton = standard unit of measure called the dalton or amu (1 amu is roughly 1. 7 x 10-24 g) Matter: anything that occupies space, and has mass (which is a quantity of matter, circular definitions ftw) Inertia: resistance to change of state of motion. Homogeneous (uniform throughout, e. g. salt solution) or heterogeneous (not, e. g. Homogeneous (uniform throughout, e. g. salt solution) or heterogeneous (not, e. g. milk - fat in a water-based medium) Compound (decomposable by chemical process) or element (not) Atomic mass = mass of neutrons, protons and electrons in amu (atomic mass units) Neutrons and protons have mass 1, electrons have a mass of something like 0. 0005. Note that atomic mass is different from atomic weight - atomic weight is the weighted average of the atomic mass of the isotopes of an element. Relative atomic mass is a synonym for atomic weight, and this is rarely a whole number.