Biology And Biomedical Sciences BIOL 2960 Lecture Notes - Lecture 4: Covalent Bond, Octet Rule, Bond Energy
19 Feb 2016
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Document Summary
Atoms in yellow are the 6 commonly found in biological tissues. Atoms in orange are found in biological tissues at a low level. The number of electrons in the valence shell determines atoms chemical. Atoms whose outermost shells have unfilled orbitals are reactive. Ex: nitrogen has 3 unpaired electrons, and can bond with 3 atoms. Covalent bonds: 2 atoms share 1 or more pairs of electrons, formed between adjacent atoms in a compound. 1/10th of that from a covalent bond. Sharing of an h atom: van de waal"s interaction. Interaction of electrons of nonpolar substances: they are less strong than covalent bonds, molecular interactions between compounds or between regions, interaction of nonpolar substances in the presence of polar within a molecule. Formed by sharing of pair of electrons between adjacent atoms. Octet rule: tendency for atoms in stable molecules to have eight electrons in their outermost shells surrounding the positively charged atomic nucleus.
