I was trying to comprehend this problem (see attached photo). Bohr's atomic model states that the total energy of an electron in any orbit is calculated with the formula: En=-(2π2me4Z2k2/n2h2(4πε0)2). However, in the attached photo, the part (4πε0)2 is missing in the denominator. May I know what happened here?

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Hi! I was trying to comprehend this problem (see attached photo). Bohr's atomic model states that the total energy of an electron in any orbit is calculated with the formula: En=-(2π2me4Z2k2/n2h2(4πε0)2). However, in the attached photo, the part (4πε0)2 is missing in the denominator. May I know what happened here? 

Radius of the eleebon's dbit in given by-
%3D
here,
paimcipal quantum number
Planck's Can tant
ニe
h =
m = ma ss q electron
K = पाट.
2 = atomic number
e= electronic Charoge.
dbit
any
TO tal enersy of eleetoun in
h given by-
En =
- an me4z?K?
Pathng the value
%3D
2スK
ス=2
tor He
%3D
When - 30 mm =30x109 m
e'k
30xi09
and For , =207m =
then eneny
E =
%3D
X16 9 m 20י .
,enersy
E2 =
720x109 J
Now,
enersy of the photon = enersy
differinee between two dbi
E, -E = (-
3.84x10 9 S
2.4 ev
e2K
30X109
e?K
e= 1-6 x 10'9 C
%3D
%3D
| 1 ev = l-6 X 10 19J
Transcribed Image Text:Radius of the eleebon's dbit in given by- %3D here, paimcipal quantum number Planck's Can tant ニe h = m = ma ss q electron K = पाट. 2 = atomic number e= electronic Charoge. dbit any TO tal enersy of eleetoun in h given by- En = - an me4z?K? Pathng the value %3D 2スK ス=2 tor He %3D When - 30 mm =30x109 m e'k 30xi09 and For , =207m = then eneny E = %3D X16 9 m 20י . ,enersy E2 = 720x109 J Now, enersy of the photon = enersy differinee between two dbi E, -E = (- 3.84x10 9 S 2.4 ev e2K 30X109 e?K e= 1-6 x 10'9 C %3D %3D | 1 ev = l-6 X 10 19J
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