Free-floating electrons, ductile, malleable, and good conductivity all describe *

metallic bonds and metallic properties

ionic bonds and ionic properties

nonmetal bonds and nonmetal properties

covalent bonds and covalent properties

Metallic bonds and properties

Explanation: metals conduct electricity because electrons are free-floating - there is overall neutrality but individual (outer) electrons are not bound to specific atom.

Metals that are malleable and ductile have a crystal-like arrangement of atoms which allow groups of atoms to slide easily over each other when pressure is applied.

the sugar phosphate backbone

Explanation:

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