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20 Cards in this Set
- Front
- Back
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Where are protons located? Neutrons? Electrons?
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protons & neutrons=inner shell
electrons=outer shell |
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Atom
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basic unit of matter
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how do u find # of neutrons?
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atomic mass - atomic#
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isotope
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atom of an element dat has a # of neutrons diff. 4om dat of other atoms of da same element
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ionic bonding
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when 1 or more electrons r transferred 4om 1 atom 2 another
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why is water polar?
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bcuz there is an uneven distribution of electrons between da oxygen and hydrogen atoms
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wat foods contain proteins
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chicken, beans, beef
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covalent bonding
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the sharing of electrons between atoms
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acid
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pH of 7 or higher, forms hydrogen ions in solution
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base
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pH of 7 or lower, forms hydroxide ions in solution
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wats a unique feature of carbon?
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has 4 valence electrons, can bond 2 other carbon atoms
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4 organic compounds
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nucleic acids, carbohydrates, lipids, proteins
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main job of carbohydrates
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living things use as main source
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2 examples of carbohydrates
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pasta, bread
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job of lipids
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store energy, form parts of membrane, waterproof covering
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2 types of lipids
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butter, oil
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2 types of nucleic acids
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DNA, RNA
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why r proteins important
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control reactions, regulate cell processes, form bone & muscle, transport substances
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4 levels of organization in protein
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nitrogen, carbon, hydrogen, oxygen
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monomers of protein
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amino acids
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