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actinium
UK
/ækˈtɪn.i.əm/
US
/ækˈtɪn.i.əm/
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Explain what “actinium” means in the example sentence.
Show how “actinium” is used as a noun and whether it can also be an adjective.
Compare “actinium” with “actinide” and explain when to use each word.
Give me five B2-level example sentences with “actinium” and their Russian translations.
Help me practise describing actinium and other chemical elements in English.
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