Unit 2: Biomolecules Flashcards
polar
a molecule that has a partial positive charge in some spot and a partial negative in another
nonpolar
a molecule with no charges or partial charges
hydrophilic
polar, attracted to water
hydrophobic
nonpolar, not attracted to water
adhesion
attraction between molecules of the different substances
cohesion
attraction between molecules of the same substance
hydrogen bond
a strong intermolecular force between a H atom and a F, O, or N atom
electronegativity
how well an atom attracts electrons, chemical property
heat capacity
amount of energy required to heat up a substance, stronger IMF=more energy needed
density
how close atoms are packed together, mass per unit of volume
pH scale
concentration of H+ atoms in a solution, ranges from 0 (acidic) to 14 (basic)
atom
basic unit of matter, made of a nucleus (protons and neutrons) and rings of electrons
ion
an atom with a charge, different number of electrons and protons
molecule
two or more atoms bonded together, smallest unit of compounds
element
“pure substance” that contains atoms of only one type, distinguished by number of protons, represented by a letter (or two) and has certain properties
functional group
patterns of atoms that are found in various molecules and behave the same way (reactivity, properties)
polymer
larger molecules made of multiple monomers
monomer
smaller molecules
dehydration synthesis
a type of polymerization in which water is produced and macromolecules bond to each other
hydrolysis
a type of de-polymerization in which water is needed for it to happen, molecules separate