Biology.- A few questions.?

Question

1. What does the atomic number of an element tell you?
2. What does the atomic mass of an element tell you?
3. What is a substance that cannot be brokent down called?
4. What is a compound?
5. Discribe an ionic bond.
6. What is a covalent bond?
7. If you add NaCl to pure water, what ions will be the resulting solution?
8. How many electroms does oxygen have in it's outer shell?
9. What makes a compound polar?
10. Why is water considered to be an effective solvent?
11. Discribe cohesion.
12. Describe adhesion.
13. What determines if a substance is acidic or basic?
14. When would you want to use wide range litmas paper compared to using pH paper?
15. What is pH?
16. What is the range ot pH that the human body normally functions between?
17. A weak attraction between polar molecules would form what type of bond?
18. What is buffer and how does it work?

I have a test coming up, and this is what my teacher said will be on it. : /.

Answer 1

1. The number of protons
2. The number of grams in a mole of atoms of the element
3. element
4. Substance formed from molecules which are themselves formed from atoms of more than one kind of element
5. Positively charged ion attracts negatively charged ion
6. Electrons are shared in shared orbitals between covalently bonded atoms
7. NA+, CL-, H+, OH-
8. You look it up.
9. Covalent bonds.
10. It'll dissolve lots of things, and dissociate ions. It's polar in nature. It's the "universal solvent."
11. Look it up in your glossary
12. Look it up in your glossary
13. When you drop it into water, is there a greater concentration of H+ ions in solution (acid), or OH- ions (base)?
14. When you have no clue about whether you're looking at an acidic solution, or a base.
15. negative one times the log10 of the mole/liter concentration of hydrogen ions (if I remember correctly, no promises).
16. Don't remember. I think our blood is slightly base... could be wrong.
17. Um... it's a weak ionic attraction. If hydrogen is involved, it'd be a hydrogen vond.
18. It's a substance that will act to maintain a stable pH, through differential dissassociation in the presence or absence of acids or bases.

Answer 2

For one thing those are chemistry questions not biology. So i don't really hold out much hope for you in the test.

Answer 3

I do know these answers but I'm not going to tell you cause your cheating yourself out of learning this and if your taking an anatomy physiology class for a professional degree such as nursing you need to know this information.I paid for college to learn this so I'm sure as hell not gonna give you the answers for free;)

Answer 4

Are you allowed to take the test to the computer lab and post the questions online? If you don't know any of this already and you have a test coming up, I think you need to shut down your computer and open your textbook.

Answer 5

18 is not a few. Here is number 7, study for the rest.

7. Na+ and Cl-

Answer 6

Sounds like you want the yahoo answers people to do your homework FOR you. read the text and you'll be able to find out. reading out loud helped me when i was doing bio. good luck on the test