Which of the following is represented by the letter a in the diagram below. amplitude, equilibrium, frequency or wavelength. i think its wavelength or frequency but im not sure.

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.