First slide

Bohr's atom model

Question

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

Moderate

A

1
B

8
C

4
D

16

Solution

$a = \frac{v^{2}}{r} ∴ a \propto \frac{(z)^{2}}{(1 / z)} (for n = 1) o r a \propto z^{3} ∴ \frac{a_{1}}{a_{2}} = {(\frac{2}{1})}^{3} = 8$

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