Carbon Chemistry. Properties of Carbon Atomic number is 6 4 valence electrons available for bonding...
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Transcript of Carbon Chemistry. Properties of Carbon Atomic number is 6 4 valence electrons available for bonding...
![Page 1: Carbon Chemistry. Properties of Carbon Atomic number is 6 4 valence electrons available for bonding Each carbon atom can form 4 bonds and can combine.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f185503460f94c2f39b/html5/thumbnails/1.jpg)
Carbon Chemistry
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Properties of Carbon
• Atomic number is 6• 4 valence electrons available for
bonding• Each carbon atom can form 4 bonds
and can combine with itself and other elements in many ways.
• Carbon atoms can form straight chains, branched chains, and rings.
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Examples
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4 Forms of Pure Carbon
• 1. Diamond - a crystalline form of carbon in which each carbon atom is bonded strongly to four other carbon atoms.
• Extremely hard and nonreactive.• Melting point is greater than 3500
degrees C (as hot as the surface of some stars)
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Diamond structure
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• 2. Graphite - each carbon atom is bonded tightly to three other carbon atoms in flat layers.
• Bonds between layers are very weak, so layers slide past one another easily.
• Used in lead pencils and is slippery.
• Makes a good lubricant in machines.
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Graphite
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• 3. Fullerene - carbon atoms arranged in the shape of a hollow sphere.
• Made by scientists in 1985.
• Named after Buckminster Fuller
• One type of fullerene is called a “buckyball”
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Buckyball
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• 4. Nanotube - carbon atoms are arranged in the shape of a long, hollow cylinder.
• Like a sheet of graphite rolled into a tube.• Made in 1991.• Tiny, light, flexible, and extremely strong.• Good conductors of heat and electricity.
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Nanotube
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Carbon Compounds• More than 90% of all known compounds contain
carbon (that’s nearly everything you can think of!)• Compounds containing carbon are called
Organic compounds. • Scientists once thought that organic compounds
could only be produced by living things. (Can now be made artificially from petroleum, or crude oil.)
• Many organic compounds have similar properties in terms of melting points(low), boiling points(low), odor(strong), electrical conductivity(none), and solubility(none).
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Hydrocarbons
• Simplest organic compounds. Contain only the elements carbon and hydrogen.
• Mix poorly with water.• Flammable (used as fuels).• Simplest is methane (CH4)• 2 carbons = Ethane (C2H6)• 3 carbons = Propane (C3H8).
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Saturated Hydrocarbons
• A hydrocarbon in which each carbon atom in the molecule shares a single bond with each of four other atoms.
• Covalent bonds.• “saturated” because no other atoms can
be added without replacing an atom that is part of the molecule.
• These are called Alkanes.
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First 4 Alkanes
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Unsaturated Hydrocarbons
• A hydrocarbon in which at least two carbon atoms share a double bond or a triple bond.
• Double bonded hydrocarbons are called Alkenes
• Triple bonded hydrocarbons are called Alkynes
• “unsaturated” because double or triple bond can be broken to allow more atoms to be added to the molecule.
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Alkenes and Alkynes
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Aromatic Hydrocarbons
• Most are based on benzene.
• Often have strong odors.
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Other Organic Compounds
• Alcohols and phenols (antioxidants)• Organic acids/ Carboxylic acids (asprin)• Esters, thiols, disulfides (anesthetics)• Halogen containing (CFC’s)• Amines and Amides/ Alkyl halides• Aldehdyes and Ketones (Vanilla,
formaldehyde, acetone• Carbohydrates, Lipids, Proteins, Nucleic
acids
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This weeks Project
• Nutrition chart
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• Name of food
• Serving size (you can convert this later)
• Total calories, fat, carbohydrates, protein, vitamin A, vitamin C, vitamin D, calcium, iron, sodium