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Byju's Answer
Standard XII
Chemistry
1900's Physics and Wave
In the Bohr's...
Question
In the Bohr's model, for unielectronic species following symbols are used.
r
n
,
z
→
Radius of
n
t
h
orbit with atomic number "z".
Calculate z in all cases.
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Solution
Radius of
n
t
h
orbit in Bohr's model
r
=
n
2
h
2
4
π
2
m
c
2
×
1
z
n
= principal quantum number ;
z
= atomic number
=
n
2
z
2
×
52.49
m
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Similar questions
Q.
In the Bohr's model, for unielectronic species following symbols are used.
K
n
,
z
→
Kinetic energy electron in
n
t
h
orbit with atomic number "z".
Calculate z in all cases.
Q.
If in Bohr's model, for unielectronic atoms, the following symbols are used,
r
n
,
z
→
Radius of
n
t
h
orbit with atomic number
Z
;
U
n
,
z
→
Potential energy of
e
−
;
K
n
,
z
→
Kinetic energy of
e
−
;
V
n
,
z
→
Velocity of
e
−
;
T
n
,
z
→
Time period of revolution.
Match List-I with List-II.
Q.
If 4 times the most probable distance of electron of a 1s orbital in a unielectronic atom /ion is given by
0.529
A
∘
then the atomic number of the unielectronic species will be. [Given: Wave function of 1s orbital,
Ψ
=
⎷
(
Z
3
π
a
3
0
)
e
−
Z
r
/
a
0
where
a
0
= radius of first Bohr's orbital in H - atom = (52.9 pm) and Z is atomic number of unielectronic species]
Q.
If in the Bohr's model for unielectronic atom, the time period of revolution is represented as
T
n
,
z
, where, n represents the shell number and
Z
represents the atomic number then, the value of
T
1
,
2
:
T
2
,
1
will be:
Q.
According to Bohr's theory radius of
n
t
h
shell is given as
1
r
n
∝
Z
y
(
Z
is atomic number). Here
′
y
′
is:
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