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In Bohr's theory of hydrogen atom if speed of an electron in the first orbit is v, then the speed in 3rd orbit is
In Bohr's theory of hydrogen atom if speed of an electron in the first orbit is v, then the speed in 3rd orbit is
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Key proportionalities for Bohr orbits to memorize:
Radius: $r \propto n^2 / Z$ (gets much bigger)
Velocity: $v \propto Z / n$ (gets slower)
Energy: $E \propto -Z^2 / n^2$ (gets less negative/closer to zero)
Radius: $r \propto n^2 / Z$ (gets much bigger)
Velocity: $v \propto Z / n$ (gets slower)
Energy: $E \propto -Z^2 / n^2$ (gets less negative/closer to zero)
Updated On: Apr 21, 2026
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