Biology 1404

Question	Answer
element	substance that cannot be broken down by chemical reactions
which elements are living organisms made of?	carbon, hydrogen, oxygen, and nitrogen
Atom structure	proton, neutron, electron
proton	positively charged
neutron	neutral/ no charge
electron	negatively charged
ion	charged atom
atomic mass	# of protons
atomic number	total # of protons and neutrons
isotopes	different atomic forms of the same element
how do we use radioisotopes?	age life, metabolism tracers
orbitals	energy levels, 2,8,8....
what do atoms do when they have unfilled orbitals?	bond
molecules	group of atoms bonded together to take part in a reaction
compounds	substance consisting of 2 or more elements
ionic bond	when a electronegative atom takes a electron from anther atom.
polar covalent bond	unequally shared electerons
nonpolar covalent bonds	equally shared electrons
hydrogen bond	bonds between hydrogen and electronegative atom
Van der Waals interactions	when electrons are not symetrically distributed
characteristics of water	cohesion, constant temp, and polar solvent
hydrophobic	dislikes water
hydrophilic	loves water
acid	more h+
basic	more oh-
buffers	maintian constant pH.

Resource summary

	Created by kirkham.brittany over 10 years ago