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The noble gas configuration for manganese is [Ar]4s23d5
Noble gases exist in the nature as gases; only a small number of (all man made) compounds of noble gases are known.
The noble gas notation starts for elements after helium. Helium has no noble gas notation. Its electronic configuration is 1s2
All noble gasses contain electrons. In fact, all gasses contain electrons.
Noble gasses are found in group number 8A or 18. There :)