BIS 2A Lecture Notes - Lecture 2: Unified Atomic Mass Unit, Atomic Mass (Band), Atomic Number
Document Summary
Bis 2a lecture 02 chemistry basics. The importance of chemistry: basic understanding of chemical properties of cell components comprehensive understanding of cell mechanisms, chemical composition of macro molecules reveals important chemical properties and function of macromolecules. Electronegativity: defined as the tendency of an atom to attract electrons to itself. Ionic bonds are the electrostatic attraction between positive ions (cations) and negative ions (anions). Involves the transfer of an electron from a less electronegative atom to a more electronegative atom: less electro negative atom becomes positive (loses electron) and more electronegative atom becomes negative (gains electron). Covalent bonds occur when electrons are shared between atoms: non-polar covalent bond is the equal sharing of electrons due to no significant electronegativity difference. Oh: continuum of bonds: nonpolar covalent polar covalent ionic bond. (equal sharing of electrons unequal sharing of electrons complete transfer of electrons) Carbon not present here because specific molecule drawn.
