Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
bio s&f 2
chapter 2
| Question | Answer |
|---|---|
| forms of energy | chemical, electrical, mechanical, radiant |
| energy resulting from the movement of charged particles | electrical |
| energy traveling in waves | radiant |
| unique form of matter; cannot be broken down by ordinary chemical reactions | elements |
| smallest portion of an element reatining the properties of that element- fundamental unit of all matter | atoms |
| properties detected with senses | physical |
| properties that pertain to the way atoms interact with one another | chemical |
| major elements of the human body | O,C,H,N |
| make up less than .01%, found as part of enzymes | trace elements |
| 2 parts of atomic structure | central nucleus, electron cloud |
| same # of protons, varying number of neutrons | isotope |
| hydrogen with 1 neutron (2H) | deuterium |
| Hydrogen with 2 neutron (3H) | tritium |
| atoms react to form | molecules |
| 2 or more different kinds of atoms chemically bonded together | compound |
| charged atoms resulting from the gain or loss of electrons | ions |
| ions that have gained one or more electrons | anions |
| ions that have lost one or more electrons | cations |
| formed by the sharing of two or more electrons | covalent bond |
| atoms with 6 or 7 valence shell electrons are | electronegative (hold electrons tightly) |
| atoms with one or two valence shell electrons are | electropositive (hold electrons less tightly) |
| hydrogen bods for between ____molecules | polar |
| H-bonds form between adjacent water molecules, therefore: | increase in surface tenstion, temperature stabilization |
| ______dissociate in water | ionic compounds |
| homogenous mixture of components | solutions |
| concentration always refers to percentage of: | solute |
| solution with particles that are visible | suspensions |
| solution that can be agitated, mixed, then settle out-heterogeneous- appear translucent or milky | colloids |
| type of reactions that involved bond formation | synthesis |
| reaction that occurs when a molecule is broken down into smaller molecules | decomposition |
| processes that are degradative | catabolic |
| processes that build up, are constructive | anabolic |
| reaction that occurs when bonds are both made and broken | exchange or displacement |
| reaction in which electrons are exchanged between the reactants | redox |
| H ions are equal to | one proton |
| acids are | proton donors |
| bases are | proton exceptors |
| when dissolved in water, acids | release H+ |
| bases either accept protons or | release OH- |
| name for OH- | hydroxl |
| [] means | concentration |
| acidic solutions have a _____ [H+] | higher |
| alkaline solutions have a ____ [H+] | lower |
| acidic solutions have a _____pH than alkaline | lower |
| in neutral solution, [H+] = | [OH-] |
| acidic solution pH = | <7 |
| alkaline/basic pH= | >7 |
| pH numerations is | logorithmic |
| compounds that contain cations other than H+ and anions other than OH-, are electrolytes, essential for nervious transmisiion, muscle contraction | salts |
| reactions that result in salt and water | neutralization |
| substances that conduct an electrical current in solution | electrolytes |
| combine with H+ or OH- to reduce or prevent a change in pH | buffers |
| acids that dissociate completely and irreversibly in water- can drastically change pH of solution | strong acids |
| acids that do not dissociate completely | weak acids |
| a buffer solution includes a weak acid and | its anion |
| helps maintain pH homeostasis of blood | carbonic acid-bicarbonate system |
| most abundant elements in living things | O,H,C |
| organic compounds contain both | C and H |
| a hydrocarbon has: | only H atoms attached to a C bacobone |
| groups of atoms bonded to a C backbone; groups give distinct properties to the complete molecule | functional groups |
| functional group -OH is | alcohols |
| functional group -COOH is | organic acids |
| small molecules combine to form larger molecules by removing H2O | dehydration synthesis |
| a large molecule is split by adding H2O | hydrolysis |
Created by:
rubytuesday
Popular Biology sets