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Chapter 2 and 3 - Chapter 2 The Chemical Context of Life...

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Chapter 2 The Chemical Context of Life
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Devil’s Garden
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Chemical Connection to Biology Formic acid
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DEFINITIONS MATTER ELEMENT ATOM COMPOUND MOLECULE MIXTURE
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Sodium is a highly reactive metal Chlorine gas is toxic. Salt is an edible compound.
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Essential Elements 96% of living matter is composed of C, O, H, N We are carbon-based units. Know these four elements How many bonds can each form? Do these elements form covalent bonds, ionic bonds or both? 4% of living matter is composed of: Ca. P, K, S, Na, Cl, Mg Trace elements:
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Essential Element Deficiencies
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Atomic definitions Electron Proton Neutron Orbital Nucleus Atomic mass Atomic number Isotope
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http://www.corrosionsource.com/handbook/periodi c/
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CC 6 C 12.01 2 4 ATOMIC NUMBER = proton number ATOMIC SYMBOL ATOMIC WEIGHT (amu) = number of protons + neutrons + e- Electron Shells Valence Electrons Number of bonds it will form to be stable
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Electron shells/orbitals fill from left to right innermost shell contains 2 electrons next shell contains 8 electrons outermost shell is the valence shell The number of valence electrons determines the basic chemical properties of an element.
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