Which of these is a property of a substance that is composed of atoms that are held together by metallic bonds?

Metallic bonds allow metal atoms to shift past one another while the bonding remains intact. This makes metals malleable, meaning they can be flattened or bent, and ductile, meaning they can be drawn into wires. So “It can be flattened and bent” is correct; metals also generally conduct electricity and often have relatively high melting points.

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