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2 July, 21:24

Which one is the least chemically reactive?

A. Ti

B. U

C. O

D. Ar

E. S

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Answers (1)
  1. 2 July, 21:30
    0
    D. Ar

    Explanation:

    Chemical reactive order: lanthanides > transition metal > O, S> Ar

    Argon have noble gas element, Electron configuration: [Ne] 3s²3p⁶

    so chemically inert, absence of chemical reactivity.
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