Question

what is the ratio of speed ofelectron presernt in second orbit of H atom and fourth orbit of He+ ?

Answer 1

Answer:

Velocity of an electron in an orbit =

2πmr

nh

Therefore

v

4

v

2

=

n

4

n

2

×

r

2

r

4

r=0.529 n

2

n

4

2

=16 and n

2

2

=4

Therefore,

v

4

v

2

=

4

2

×

4

16

=2

∴

v

4

v

2

=2 and v

4

=

2

v

2

=

2

x

Answer 2

Answer:

Answer:

Velocity of an electron in an orbit =

2πmr

nh

Therefore

v

4

v

2

=

n

4

n

2

×

r

2

r

4

r=0.529 n

2

n

4

2

=16 and n

2

2

=4

Therefore,

v

4

v

2

=

4

2

×

4

16

=2

∴

v

4

v

2

=2 and v

4

=

2

v

2 =

2

x