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Question generated: The chemical symbol for niobium is Nb. Based on its symbol, what can be concluded about niobium?

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Question generated: Which food items can be broken down mostly into amino acids?

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Question generated: The Late Heavy Bombardment was a period of extensive comet impact on Earth about 3.8 billion years ago. Scientists believe this period provided much of the matter now found in which part of the Earth system?

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Question generated:
During which phase change is heat energy absorbed by a substance?