Question

Why sodium and gallium are called metals?
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Answer 1

Answer:

1. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell, which it readily donates, creating a positively charged ion—the Na+ cation. Its only stable isotope is 23Na. The free metal does not occur in nature, and must be prepared from compounds.
2. Elemental gallium is a soft, silvery blue metal at standard temperature and pressure; however in its liquid state it becomes silvery white. ... It is in group 13 of the periodic table, and thus has similarities to the other metals of the group, aluminium, indium, and thallium.