Can someone me, ?
organic, biological, and nuclear chemistry.

17. which of the following is not an example of a lipid?
a. waxes
b. fats
c. ribose
d. oils

18. is the radioisotope commonly used to map a human's circulatory system.
a. iron-59
b. carbon-14
c. cobalt-60
d. technetium-99m

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol