Chemistry

What is the most abundant halogen found in the Earth's crust?

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Under standard conditions, what periodic table group exists in all three main phases of matter?
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What orbital is described by the quantum numbers: n=3 and l=2?
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What is a substance made from only one type of atom called?
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Compounds of what element are used in soaps, fertilizers, explosives, and matches?
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What alkali metal is highly radioactive and decays into either astatine, radium, or radon?
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Which has no part in the scientific method of experimentation?
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Lutetium on the periodic table is noted by which symbol?
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What element has an atomic number of 40?
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