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Blue is the metal Metals react by losing electrons from the outermost shell, which means their outermost electrons and now closer to the nucleus (one shell lower) and thus they get smaller when you go from metal atom to metal ion.

Explanation:

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest