The ratio between total acceleration of the electron in singly ionized helium atom and hydrogen atom (both in ground state) is

Answer

8

Explanation

`a = (v ^(2))/(r)`
` because v prop Z,`
`because r prop (1)/(Z)`
`implies a prop ((Z) ^(2))/( (1 //Z))`
`implies a prop Z ^(3)`
`(a _(He^(+)))/( a _(H)) = (( Z _(He ^(+)))/ Z _(H))^(3) = 2 ^(3) = 8`