BIOL 1334 Lecture Notes - Lecture 2: Uranium-238, Deuterium, Bicarbonate
1 Apr 2019
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Matter: anything that occupies space and has mass. Major elements: carbon -18, oxygen 65, hydrogen-9, nitrogen 3% Minor elements: calcium 1. 5, phosphorus 1% Trace elements are less than 1: sodium, potassium, cl, iron, mg, cu, zn, co, mn, se, i. Protons are positive, 1 da or amu. Protons and neutrons are found in the nucleus. Atoms that have more neutrons than protons: deuterium is a hydrogen with 1 neutron, tritium is a hydrogen is 2 neutrons. If an electron moves to the inner shell energy is released. If an electron moves from the inner shell to the outer shell energy must be supplied. First shell cannot have more than 2 electrons and outermost shell cannot have more than. Energy shells: 1s, 2s, 2px, 2py, 2pz. Noble elements are inert: neon, krypton, xenon, redon, etc chemically radioactive atoms, have less than 2 electrons in the first shell, have less than 8 electrons in the outermost shell.
