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16 Cards in this Set
- Front
- Back
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chemistry
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science of the structure and interactions of matter
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major elements (96%)
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oxygen, hydrogen, nitrogen, carbon
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lesser elements (3.8%)
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calcium, phosphorus, potassium, sulfur, sodium, chlorine, magnesium, iron
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iodine
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needed to make thyroid hormones
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atoms
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smallest units of matter that retain the properties and characteristics of the element
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nucleus
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contains protons, neutrons
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atomic number
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number of protons in nucleus
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ionic bond
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positive and negative ions attracted together
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covalent bond
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share outermost electron
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hydrogen bond
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h+ attracts partial negative charge of neighboring electronegative ions
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synthesis reaction
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2 or more atoms combine to form new molecule
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decomposition reaction
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molecule is split apart
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exchange reaction
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2 molecules switch components with each other
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reversible reaction
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reactions that proceed in both directions
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define pH
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acid-base balance
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how body maintains pH within limits of homeostasis
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buffer systems (carbonic acid-bicarbonate)
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