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11 Cards in this Set
- Front
- Back
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Atomic number
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# of p+ (left subscript); atomic weight = # of p+ + n (left superscript)
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Isotopes
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have different #s of neutrons, but same # of protons
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Electrons
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orbit around a nucleus like planets around a star. There are different shells, or energy levels,in which electrons move.
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Outermost shell (aka valence shell)
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prefers to be full → more stable atom
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An atom is composed of
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nucleus w/ protons and neutrons; electrons that move around the nucleus
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Covalent bonds
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Are usually polar.
Relatively weak bond formed between atoms,made by sharing electrons. |
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Ionic bonds
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Strong molecular bond, formed beteen atoms with opposite charges
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Hydrogen bonds
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Weak bond formed by electrical attraction between molecules
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Water has six ‘life‐sustaining’ properties
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1. liquid at RT
2. great solvent 3. cohesive and adhesive (‘sticky’) 4. high specific heat 5. high heat of vaporization 6. solid water (ice) floats |
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what is the pH in your stomach? in your blood?
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7,3
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Name the structure
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