Question:

Metalloids vs true metals?

In what ways do metalloids differ from true metals?

Answer:

By decomposing the alkali metal by combustion to remove oxygen atom or hydrogen atom... Decomposition may be method for extracting some of the alkali metal...
Electrolysis of the molten compound. As these metals are very reactive you need a very strong reducing system to produce the metal. A cathode is a powerful reducing system. If you try to do a displacement reaction, you would need a more reactive metal than the one you are trying to extract. Even if possible, it would be very expensive and dangerous to handle.

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