Chemistry
Which of these is an element?
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What post-transition metal is used to make blue and violet light-emitting diodes (LEDs) and diode lasers?
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A compound or molecule that is composed of carbon, oxygen and hydrogen best fits which science term?
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What is the most commonly used material in the manufacturing of semiconductors?
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What symbol appears on the periodic table for the element with the atomic number 92?
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What is the most commonly encountered form of silver?
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