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What is the half-life of Rubidium-Strontium 87?
Chemistry
What is the half-life of Rubidium-Strontium 87?
4.5 Billion Years
1.3 Billion Years
25 Billion Years
47 Billion Years
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Which of the following carries a negative charge?
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Which of the following molecules does not exhibit delocalized pi bonding?
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In an ethyne molecule, what is the hybridization of each of the carbons?
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Beryllium, magnesium, calcium, strontium, barium, and radium consist what group of elements?
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What do scientists use to help organize the elements?
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In a triple bond, how many each pi and sigma bonds are there?
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What is the name of the protein found in wheat flour?
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Sodium on the periodic table is noted by which symbol?
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