chemistry review & organic chemistry. isotopes archaeological dating – carbon-14 can be used...
TRANSCRIPT
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Chemistry Review & Organic Chemistry Review & Organic ChemistryChemistry
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Isotopes
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Isotopes• Archaeological Dating
– Carbon-14 can be used to determine how long ago the organism died
• Smoke Detectors– Americium-241 – can detect smoke from
fire early
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Isotopes• Food Irradiation
– Cobalt-60 is used to irradiate bacteria on food
• Medicinal Uses– To detect location of
diseased tissue for specific treatment
– Thallium-201 used for stress test to detect blood-starved heart tissue
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Intra Molecular Bonds
A. Ionic Bonds:
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B. Covalent
• Non-polar Covalent
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Polar Covalent Bonds
Why does this happen?
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Ionic versus Covalent BondingIonic• Metal cation + non-metal
anion
Covalent• 2 neutral non-metal atoms
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Intermolecular Bonds
A. Dipole-dipole bonds
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B. Hydrogen bonds
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C. London Forces- Weakest intermolecular force
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Why is ice less dense than water?
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Water Molecule Structure-Properties of water exist because of its molecular structure
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High Surface Tension
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Liquid at Room Temperature
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High light transmission
• Colourless substance
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Strong Cohesive Properties & High Tensile Strength
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The Versatile Solvent• “like” molecules
dissolve in “like” molecules
• Polar molecules =
• Non-polar molecules =
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High Specific Heat Capacity
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Biological Structures
DNA
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Carbohydrates
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ORGANIC CHEMISTRY
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ALKANES
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ALKENES
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QUESTIONS
• Alkanes are considered to be saturated, while alkenes and alkynes are considered to be unsaturated. Looking at the diagrams what is the difference between a saturated molecule and an unsaturated molecule?
• Have you heard of saturated and unsaturated molecules before? Where can you find them in your diet?
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CYCLIC
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AROMATICS
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FUNCTIONAL GROUPS
• Electronegative atoms like O, N, F that are on a hydrocarbon
• How would such a group change the properties of the molecule?
1-pentanol
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