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Question

How can we say ions like Helium , beryllium,etc are hydrogen like sprcies.?

Pls explain.

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Solution

It is not Helium and Beryllium , it is helium and beryllium ions. (He+ and Be3+)

Because in Bohr’s model for hydrogen atom we consider only Coulombic interactions between one proton and one electron.

It cannot be extended for other atomic species containing more than one electron. Because in this case in addition to the interaction between nucleus and electron there arises the interactions between electron and electron of the same species. Bohr couldn't solve this problem and this problems are successfully explained on the basis of later developed quantum mechanics.o

But Bohr's model can be applied successfully for hydro genic species like He+, Li2+ , Be3+


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