Chemistry

Which of the following is an element?

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What is H20 more commonly known as?
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Who wrote the book "The Principles of Chemistry"?
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Who performed the infamous gold-foil experiment that first detected the existence of the atomic nucleus?
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Which element was the first ever artificially created?
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Which of the following analytical techniques gives an "ion peak"?
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What orbital is described by the quantum numbers: n=3 and l=2?
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The Nature of the Chemical Bond, was published in 1939, who wrote it?
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Which element has Na as its chemical symbol?
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