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AP Chemistry Chemistry Basics
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LE 2-4 Cloud of negative charge (2 electrons) Electrons Nucleus
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Molecule: Same element
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Molecule: Different elements
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Energy and Atoms Third energy level (shell) Energy absorbed Second energy level (shell) First energy level (shell) Energy lost Atomic nucleus
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Valence Electrons
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Covalent Bonds
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POLAR MOLECULE – O H H + + H2O
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Ionic Bonds
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SALT Na+ Cl–
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HYDROGEN BONDS – + + – + + + Water (H2O) Hydrogen bond Ammonia
(NH3) + + +
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Van der Waals Interactions
e e e- e e- e e- NUCLEUS
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