helium - This element has 1 electron shell, beryllium - This element has 2 electron shells, magnesium - This element has 3 electron shells, manganese - This element has 4 electron shells, palladium - This element has 5 electron shells, bismuth - This element has 6 electron shells, francium - This element has 7 electron shells,

How many electron shells in a Bohr model.

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