What are three type of energy transfer of tea pot

Me with these questions if you’re it sure don’t answer

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

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.