Which of the following is an unreactive metal?

1. Na
2. Au
3. Rn
4. Ra
5. Cl

Is it 2. Au?

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  1. I don't like the word unreactive. But Gold is quite resistant to many reactions. But gold can react to form compounds, gold ligands being quite common.

  2. Gold is the least reactive of the 5, though, correct?

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  3. correct.

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