A metal is generally considered to be a pure element which readily forms cations. Metals are characterised by their opacity and high thermal and electrical conductivities, the latter properties resulting from the delocalised and mobile nature of the electrons over the crystal structure.

Piezas de material planas e irregularmente formadas.

El tamaño máximo del copo está indicado pero copos individuales pueden tener tamaños sensiblemente superiores.

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