Question

ALLEN EE-Chemistry e Erage life ime of an excited stute of Haom is oforder 10 sec, estimate how many orbits an e es henitsn th state n=Land betore it suffcrs a transition ton =1 state ASOO30​

Answer 1

Answer:

The velocity of the electron in the second orbit of H atom is u=1.09×10

8

cm/s.

The orbital frequency is

circumference of orbit

velocity of electron

=

2πr

u

=

2×3.1416×4×0.529×10

−8

cm

1.09×10

8

cm sec/s

=8.2×10

14

/s

The number of orbits made by the electron =8.2×10

14

/s×10

−8

s=8.19×10

6

≈8×10

6

.

Hence, the correct option is A