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20 Cards in this Set

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