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30 January, 20:37

Which one is the least chemically reactive?

A. Ti

B. U

C. O

D. Ar

E. S

Answers (1)
  1. 30 January, 21:57
    D. Ar


    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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