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Byju's Answer
Standard XII
Chemistry
Bohr's Model of a Hydrogen Atom
Calculate the...
Question
Calculate the radius of third orbit of H atom from the data given below-
Given that,
h
=
6.63
×
10
−
27
e
r
g
, mass of the electron
m
=
9
×
10
−
28
g
and charge
Q
=
4.8
×
10
−
10
e
s
u
.
A
3.77
A
o
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B
4.77
A
o
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
1.77
A
o
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D
2.77
A
o
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Solution
The correct option is
B
4.77
A
o
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0
Similar questions
Q.
Given that,
h
=
6.63
×
10
−
27
erg and for the electron
m
=
9
×
10
−
28
g
and charge is
4.8
×
10
−
10
esu. Radius of 1st Bohr orbit of a hydrogen atom:
Q.
Calculate the ratio of the velocity of light and the velocity of electron in the first orbit of a hydrogen atom. (Given,
h
=
6.624
×
10
−
27
e
r
g
−
s
e
c
;
m
=
9.108
×
10
−
28
g
,
r
=
0.529
×
10
−
8
c
m
).
Q.
Calculate the radius of second Bohr orbit in hydrogen atom from the given data.
Mass of electron=
9.1
×
10
−
31
K
g
Charge on the electron
=
1.6
×
10
−
19
C
Planck's constant=
6.63
×
10
−
34
J
−
s
Permitivitty of free space =
8.85
×
10
−
12
C
2
/
N
m
2
Q.
Calculate the velocity of an electron having wavelength of
0.15
n
m
. Mass of an electron is:
9.109
×
10
−
28
g
.
(
h
=
6.626
×
10
−
27
e
r
g
−
s
)
.
Q.
An electron has mass
9.1
×
10
−
28
g
and is moving with a velocity of
10
5
c
m
/
s
e
c
. Calculate its wavelength when
h
=
6.626
×
10
−
27
e
r
g
−
s
e
c
.
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