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25
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Give the CAS registry number for strontium.
CAS7440-24-6
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20
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Answer the element with element number 118.
Og (Oganesson)
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25
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Give a liquid mixture of concentrated hydrochloric acid and concentrated nitric acid in a volume ratio of 3:1.
aqua regia
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seesaw
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gold
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gift
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lifesaver
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15
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Answer how many element numbers there are.
127
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banana
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star
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gift
Win 25 points!
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thief
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