Chemistry

What is the fourth most abundant element in the universe by mass?

More Questions from Chemistry
What is the name of the temperature at which Helium I becomes Helium II?
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The most common commercial use of magnesium metal is as an alloying agent with what other element?
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Which of these is a fuel?
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What percentage of acetic acid is legally allowed in vinegar?
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Inhaling what gas temporarily makes the sound of a person's voice squeaky?
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What symbol appears on the periodic table for the element with the atomic number 106?
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Which of the following is a compound?
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What element forms about 78% of Earth's atmosphere by volume?
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