CH-1209
Metallic bonding
Chemistry · Secondary 4 · Hard · Metallic bonding
Sodium metal conducts electricity when solid, but solid sodium chloride does not. Which statement explains why sodium metal conducts electricity?
A sodium atom has one valence electron.
A sodium atom has one valence electron.
- Sodium metal has delocalised electrons that can move through the lattice.
- Sodium metal contains mobile sodium ions that move freely in the lattice.
- Sodium metal has no ions, so electrons are easily shared in pairs.
- Sodium metal contains fixed electrons, but vibrating ions carry the charge.
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