The correct description for an atom of helium would be option C. An atom of helium has its valence electrons in its first energy level, it wouldn't and can't satisfy the Octet rule as it only has 2 electrons, but with 2, it has a full shell, as the first energy level can hold only 2 electrons.
Answer: Boiling chips provide surfaces on which bubbles can form as the liquid boils.
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It's a mixture of H2O + a soluble substance like, salt.
Answer:
we can do it again and again and again and again and again and again
