BLAW 231 Chapter : Business Law Chapter 1
15 Mar 2019
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One atom donates an electron to another: hydrogen bond between partially charged atoms. Valence vs. valence electrons: valence is the number of electrons needed to fill the outermost shell of an atom, valence electrons are the electrons contained in the outermost electron shell of an atom. Ionic bonds: weak, figure 2. 14 [cation = +, anion = -] Covalent bonds: strong, sharing of electrons, figure 2. 13 vvv. Polar bonds: unequal sharing of electrons, partial + and partial regions, no net charge. Hydrogen: weak (non-covalent) bonds, between partial+ and partial- charges, figure 2. 16. Water: 70-90% of weight of most life forms, sets the lower temperature limit for life, water is a biological molecule, unusual properties of water. Ice nucleators: protein, polysaccharides, prevent super-cooling and rapid freezing, causing freezing at a higher temp, freeze tolerant plant in moodle. Lobelia telekii: found in mountainous regions, alpine species experiences temps varying from -10 degrees to 10 degrees c.
