Chemistry
Beryllium, magnesium, calcium, strontium, barium, and radium consist what group of elements?
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The noble gases that make up Group XVIII of the periodic table is also known as which of the following?
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What is a vital constituent of plant and animal life, and is the key component of hemoglobin?
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What is the approximate heat of vaporization of water at its boiling point?
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What two common ingredients cause an observable chemical reaction when mixed?
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What is the oxidation number on the chromium in a dichromate ion "(Cr2O7)^2-"?
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Which of the following is an abiotic factor in an environment?
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What is the chemical combination of silicon and oxygen called?
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