chemistry. chemistry is the science concerned with the composition, structure, and properties of...
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Chemistry
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Chemistry is the science concerned with the composition, structure, and properties of matter.
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Atoms are the basic units in chemicals.
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Atoms are made of subatomic particles.
• protons (+)• neutrons (0)• electrons (-)
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An element is a pure substance made up of only one kind of atom.
All matter is made up of elements.
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Reading the Periodic Table
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Molecules
• atoms combine to form molecules, which can be pure elements or combinations of two or more elements.
• molecules are held together by chemical bonds.
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NaCl
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NaCl in Solution
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Covalent Bonds
• formed when atoms share electrons
• sharing can be unequal
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Chemical Reactions
• reactants• products
example:
CO2 + H2O C6H12O6 + O2
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Acids and Bases
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