The answer would be c. Have you ever seen gravy? It always separates and leaves different layers.
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Answer:
True
Explanation:
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<span>By far the most common isotope of carbon is carbon-12(<span>12C</span>), which contains six neutrons in addition to its six protons. The next heaviest carbon isotope, carbon-13 (<span>13C</span>), has seven neutrons. Both <span>12C</span> and <span>13C</span> are called stable isotopes since they do not decay into other forms or elements over time.</span>