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science QUIZ

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  • Answer the element with element number 118.
    Og (Oganesson)
  • Give a liquid mixture of concentrated hydrochloric acid and concentrated nitric acid in a volume ratio of 3:1.
    aqua regia
  • Answer how many element numbers there are.
    127
  • Give the CAS registry number for strontium.
    CAS7440-24-6
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