Chemistry

What is the symbol used on the periodic table for the element Protactinium?

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What element gets its name from the Greek word "kryptos" meaning "the hidden one"?
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What are chemicals made from oil called?
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What state of matter takes a shape of its own?
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How many more times acidic is a solution of pOH 5 than a solution of pH 5?
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Out of the following list, which is NOT a strong acid?
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Which of the following subshells has the highest energy?
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Selenium came from the Greek word "selene", which means what word in English?
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What happens to water when it freezes?
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