8.27.14 Chemistry of Life BLACKBOARD

8.27.14 Chemistry of Life BLACKBOARD - Chemistry of Life...

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Chemistry of Life; Water Chapters 2 – 3
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I thought this was a biology course? Biology is a multidisciplinary science
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Chemistry – what’s your first thought?
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What’s an element?
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Compounds
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Life’s elements Which do you think contributes the most MASS to the human body?
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Life’s elements
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What gives each element its signature?
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Elemental characteristics
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Recent discovery
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Chemistry does not suck
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Isotopes
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Isotopes
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Isotopes
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Isotopes If an isotope is unstable, its nucleus has a tendency to lose particles This is the definition of a RADIOACTIVE ISOTOPE
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Why should I care about isotopes?
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Why should I care about isotopes?
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All about electrons Nucleus 1st shell = up to 2 electrons 2nd shell = up to 8 electrons 3rd shell highest energy level (in this figure) etc…
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All about electrons When an electron absorbs energy (like light), it will move to a higher energy level a shell that’s farther from the nucleus
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Unformatted text preview: All about electrons Nucleus Valence shell Why should I care about the valence shell? Noble gases are inert (don’t react) Fluorine Chlorine Chemical Bonds • Covalent bonds Chemical Bonds • Polar covalent bonds Chemical Bonds • Polar covalent bonds Chemical bonds • Ionic bonds Chemical bonds • Why should I care about ionic bonds? More ion application Chemical bonds • Hydrogen bonds Shape of molecules Chemical reactions • The making and breaking of chemical bonds • More on these later… Water • An entire chapter about 1 freakin’ molecule! Water • Cohesion water molecules “stick” together via hydrogen bonds Water Water: “The Solvent of Life” Announcements • McDaniel KnitWits – Tuesdays, 4:30-6pm, 2nd floor Eaton Hall. • 5pm tonight in Decker – French Film Festival...
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