428343
Description
Flashcards by kirkham.brittany, updated more than 1 year ago
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Created by kirkham.brittany
almost 12 years ago
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| 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. |
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