Which element has a complete valence electron shell?

a. selenium (se)
b. oxygen (o)
c. fluorine (f)
d. argon (ar)

answer soon.

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules

Asuspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. if one wishes to follow this process by monitoring the release of 14co2, at which positions in the glucose molecule would the 14c label need to be incorporated?