BIOL 1105 Chapter Notes - Chapter 2: Dmitri Mendeleev, Valence Electron, Triple Bond
27 Aug 2016
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Lowest energy level is k (1 s orbital) Next is l (1 s orbital, 3 p orbitals) If e- moves to higher energy level, energy is absorbed. If e- moves to lower energy level, energy is released e- has potential energy because of its position. 8-element periodicity based on interactions of valence e- If full valence electron, then element is inert/radioactive (noble gases) C, h, o, n, p, s, na, k, ca, mg, fe, cl. Single bond: 1 e- pair is shared (h--h) Double bond: 2 e- pairs are shared (o==o) Triple bond: 3 e- pairs are shared (n n) Carbon must form 4 covalent bonds to satisfy octet rule. Concentration of reactants and products (high concentration = more collisions) Polarity of water underlies water"s chemistry and the chemistry of life. Most stable arrangement is tetrahedron, bond angle = 104. 5 . Negative regions occupy more space, so o-h bond is smaller.
