functional groups Flashcards
sulfhydryl
SH
polar
hydrophilic
acid
phosphate
polar weakly acidic
PO4
hydrophilic
hydroxyl
OH polar,weakly acidic, hydrophilic
carbonyl
polar
neither base or acid
c-o
hydrophilic
carboxyl
COOH
polar, weakly acidic
hydrophilic
amino
polar, weakly basic
NH2
hydrophilic
methyl
non polar
CH3
hydrophobic
acid
what is carbon dating
system of calculating the age of old object by measuring carbons
covalent vs ionic bond
c- sharing of electrons- 2 nonmetals I- transfer of electrons- metal and non metal
electronegativitiy
-more proteins the more electronegative. N and O are most!!
what is an ion
atom that has lost or gained electrons
how many orbitals
2
valence vs valence shell
shell-outermost shell
valence- # of unpaired electrons
molecular vs structural formulas
molecular- numbers and types of atoms
structural- indicates which atoms are bonded together
hydrogen bond
attraction between hydrogen w partial (+) and another atom w partial (-)
hydrophilic and it’s charge
full charge or partial- water loving
hydrophobic and it’s charge
no charge- water fearing
cohesion
attraction between like molecules
adhesion
attraction between unlike molecules
surface tension
-what cuts ur skin when bellyflop
octet rule
valence shell stable at 8 even if can hold more
molecules
substances held together by covalent bonds- o2
compounds
different elements held together H2O
what elements are always polar covalent
oxygen, nitrogen
chemical reaction
substances combine/break chemical bonds into other substances
acids
any compound that gives up protons or accepts electrons
bases
any compound that acquires protons or gives up electrons
buffers
a substance that acts to minimize changes in the pH when an acid or base is added
endothermic vs exothermic
endo-reactants absorb heat energy from surroundings exo- releases heat
entropy
amount of disorder in a system or surrounding enviornment
dense- low entropy spread out- high
continuum
degree to which electrons are shared in chemical bonds
nitrogen and oxygen are polar or non polar and why
polar bc of electronegativity
ionic and covalent-metals, nonmetals
ionic - metal and nonmetal co- 2 nonmetals
how many bonds can each of these form- O,N,C
oxygen-2 Nitrogen-3 Carbon-4
0-7 on pH scale
more H+ - acids
7-14 on pH scale
more OH- .. Bases
neutralization reaction
acid and base react to form water and salt
partial or full charged molecules are what?
hydrophilic
heat
transfer of kinetic energy to one another
non polar covalent bonds have high what
potential energy