BSC 114 Lecture Notes - Lecture 1: Nonmetal, Chon, Covalent Bond
22 Jan 2017
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Life requires about 25 of the 92 naturally occurring elements. C, o, h, n are the most important. Elemental deficiencies can lead to negative effects on life. Protons - positive, atomic mass = 1 dalton. Neutrons - negative, atomic mass = 1 dalton. First orbital has a max of 2 electrons. Every orbital after has max of 8 electrons. Attraction of an atom for the electrons of a covalent bond. The more electronegative an atom is, the more strongly it pulls shared electrons towards itself. Nonpolar and polar covalent bonds share electrons differently. Subtract the electronegativity of the elements in a bond. Subtract the electronegativity of the elements in the bond. The smaller the atom, the more electronegativity it has. Ca (1. 0 en) and o (3. 5 en) Subtract the difference of electronegativity and it is 2. 5. Watch video on blackboard classifying bonds based on electronegativity . One atom actually strips an electron completely away from its partner.
