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An electron can be added to a halogen atom to form a halide ion with?
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The most important element on the earth’s crust is?
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A gaseous metallic chloride MCl consists of 20.22% of M by…
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Four elements P, Q, R and S have atomic numbers of 4…
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What are the possible oxidation numbers of an element if its…
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How many valence electrons are contained in the element…
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The electronic configuration of an element is 1S² 2S²…
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In the study of physics, temperature and heat are often confused with…
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The mass of a proton is approximately equal to that of…
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The element that is essential for the coagulation of blood is…
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