Create an account
Which four elements are the primary components of important biological molecules, such as proteins, fats, and carbohydrates?
nitrogen, carbon, hydrogen, and oxygen
Atoms with the same number of protons but with different electrical charges _____.
are different ions
The pH of human blood is maintained at around pH 7.4. Why does a buffer system need to be present in blood to protect against changes in pH due to increases in acids?
The metabolic processes of the body produce more acids than bases.
The number of protons in an uncharged atom _____.
equals the total number of electrons in the orbital shells
For most atoms, a stable configuration of electrons is attained when the atom _____.
has 2 or 8 electrons in its outermost shell
How are cohesion and surface tension related to the chemical properties of water?
All are properties related to hydrogen bonding.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together