1.

The radius of first Bohr.s orbit for hydrogen is 0.53Å. The radius of third Bohr.s orbit would be

Answer»

`0.79 A^@`
`1.59A^@`
`3.18 A^@`
`4.77 A^@`

SOLUTION :`R= (n^2)/(Z) (0.529) A^@ = 0.529 XX 3^2 = 4.77 A^@`


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