Modern Physics> A gas of hydrogen like atoms can Pls tell...

A gas of hydrogen like atoms can

Pls tell Q14 and 15

Sheel Ranjan Bajpai , 7 Years ago

Grade 11

1 Answers

Bishal Raj Panda

Last Activity: 7 Years ago

(a)

n(n-1)/2 =3

:. n=3

i.e. after excitation atom jumps to the second state

hence n_f=3 n_i=1,2

If ni = 1 then energy emitted is either equal to, greater than or less than the energy absorbed. Hence the emitted wavelength is either equal to, less than or greater than the absorbed wavelength.

Hence ni not equal to 1.

If ni = 2, then E_e greater than or equal to E_a . Hence lamda_eless than or equal to lamda_a

(b)

E3-E2=68eV

(13.6) (Z²) (1/4 -1/9) = 68

Z=6

lamda_min=12400/E3-E1 =12400/435.2=28.49

(d)

Ionization energy= (13.6) (6)² = 489.6 eV

lamda=12400/489.6 = 25.33

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Modern Physics> A gas of hydrogen like atoms can Pls tell...

A gas of hydrogen like atoms can Pls tell Q14 and 15

Sheel Ranjan Bajpai , 7 Years ago

Bishal Raj Panda

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