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Inorganic Chemistry - Atomic Structure

Inorganic Chemistry - Atomic Structure. Biology 2121 Chapter 2. Introduction. (1). Cells are the basic units of living organisms Atoms ----- elements --- compounds (molecules) Matter (2). Elements 116 total (92 naturally occuring ) 96% of body (C,O,H,N) 20 trace elements

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Inorganic Chemistry - Atomic Structure

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  1. Inorganic Chemistry - Atomic Structure Biology 2121 Chapter 2

  2. Introduction • (1). Cells are the basic units of living organisms • Atoms ----- elements --- compounds (molecules) • Matter • (2). Elements • 116 total (92 naturally occuring) • 96% of body (C,O,H,N) • 20 trace elements • (3). Inorganic vs Organic Chemistry

  3. Atomic Structure • (1). What are atoms made of? • Nucleus (protons and neutrons) • Energy levels (electrons) • (2). Properties • Neutrons (0, 1 amu) • Proton (+1, 1 amu) • Electron (-1, 1/2000 amu) • Marieb link

  4. Elements and the Periodic Chart • (1). Metals and Nonmetals • (2). Atomic Number • Protons • (3) Mass Number • Protons + electrons • Mass of the atom!

  5. Elements and the Periodic Chart

  6. Average Atomic Mass and Isotopes • What are isotopes? • Same type of atoms with differing numbers of neutrons. • Average of all isotopes • Average atomic mass number • Not all isotopes –equal amounts

  7. Valance Electrons and Planetary Models • (1). Valance electrons • Outer shell electrons • Involved in bonding • (2). Drawing Planetary Models of atoms • Periodic chart (appendix C)

  8. Valence Shells

  9. Why are valence electrons important? • Valenceelectrons are involved in bonding • Electrons • Transferred from one atom to another • Shared between atoms

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