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There are four substances labeled as A, B, C, and D. Substance B is composed of one kind of atom. When heat is applied to substance C, it decomposes into simpler substances. Meanwhile, heating substance A and D did not alter the composition of both substances. Based on the findings, which of the following is an element?

Sagot :

A and D are elements because they cannot be decomposed further even after any physical processes (like applying heat).