Metallic bonding review

In the diagram labeled Sea of Electrons Model, what feature allows valence electrons to move freely through the metal?

• Overlapping valence shells create a shared region

• Isolated atoms with separate outer shells

• Strong covalent bonds between specific pairs

• Fixed positions of electrons around each nucleus

Tags

NGSS.HS-PS1-3

Which statement best explains metallic electrical conductivity as shown in the conductivity diagram?

• Protons drift across the metal when voltage is applied

• Core electrons jump between nuclei to move charge

• Atoms rotate to transfer energy along the solid

• Mobile valence electrons carry charge through the lattice

Tags

NGSS.HS-PS2-6

In the malleability diagram, why can a metal be hammered into thin sheets without breaking?

• Covalent bonds lock atoms into fixed orientations

• Ionic bonds reform into rigid layers that resist motion

• Core electrons form new bonds preventing displacement

• Valence electrons shift to new positions maintaining attractions

Which description matches the term delocalized as applied to valence electrons in metals?

• Fixed in place near a single nucleus

• Not confined to one atom, spread across many

• Transferred completely to a neighboring anion

• Orbiting in discrete pairs forming covalent bonds

Tags

NGSS.HS-PS1-3

Which pair of particles is primarily involved in metallic bonding according to the model?

• Protons and neutrons creating nuclear forces

• Anions and cations forming ionic crystals

• Neutral atoms and shared localized electrons

• Positive metal ions and delocalized free-moving valence electrons

Select all properties that directly result from delocalized valence electrons in metals.

• Transparency to visible light

• Malleability under stress

• High melting point

• High electrical conductivity

In the high melting point diagram, what force makes it difficult to separate metal atoms?

• Electrostatic repulsion between positive nuclei

• Van der Waals forces among neutral particles

• Hydrogen bonding between adjacent metal atoms

• Strong attraction between ions and delocalized electrons

Tags

NGSS.HS-PS1-3

A metal sample is stretched into a wire. Which explanation best fits the diagram showing malleability?

• Electrons rearrange to maintain attractions as atoms shift

• Protons migrate to bind atoms during stretching

• Covalent bonds rotate to keep atoms aligned

• Core electrons detach to form new ionic bonds