BIOL 2010 Lecture Notes - Lecture 2: Endergonic Reaction, Collision Theory, Ionizing Radiation
Document Summary
Chemistry in a&p: you are made of elements. Predominately made of 3 elements (o2, c, h) but even the trace elements are important for natural physiology: some are classified as minerals. Inorganic elements extracted from the soil by plants and then moved up the food chain. Ca, p, cl, mg, k, na, s, i, fe, mn, zn, cu. Number normally equals the number of protons. Weight is negligible : protons and neutrons found in the nucleus while electrons are found in orbits called shells. Bohr model of atoms is overly simplistic but it will work for us. Isotopes: changing the number of neutrons doesn"t affect the bonding behavior of the atoms. Does affect their physical behavior and they may be unstable. It is the valence electrons that matter there. Isotopes: friend or foe: both, radiation ( the emission of energy as electromagnetic waves ) doesn"t necessarily mean radioactive isotopes.
