Chemistry

What element has an atomic number of 40?

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What symbol appears on the periodic table for Calcium which has the atomic number 20?
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Which of these compounds is insoluble in water?
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What is the primary hormone that has a role in stress adaptation?
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Which type of matter has definite volume but no definite shape?
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What are the main two elements that undergo fusion to power the sun?
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What do city trucks spread on roads to melt ice?
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What radioactive metallic element, found in all uranium ores, has an atomic number of 89?
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If you crush a diamond, what color is the dust?
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