How do the densities of the planets support the nebular theory?

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.

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water

Someone with these questions! pls 30 pts