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WorksheetsQuiz on unit 5
Total questions: 10
Worksheet time: 9mins
Thermal radiation has a … spectrum
line
continuous
invisible
no correct answer
The energy of electron outside the hydrogen atom is … energy
positive
negative
Calculate the shortest wavelength in Balmer series then find the frequency of this radiation. given that
{RH = 109677.6 cm -1 , Vlight = 3 x 108 m/s}.
λ =3.65 x 10−7 m
f = 4.44x 10 -4 Hz.
λ =3.65 x 10−5 m
f = 8.22 x 1014 Hz.
λ =3.65 x 10−7 m f = 8.22 x 1014 Hz.
λ =6.65 x 10−5 cm f = 4.44x 10 -4 Hz.
The black body is (a)
The Thomson model of the atom announce that the atom is like a solid ball which elastic, smooth and small.
True
false
The fist model of the atom is.......
Bohr's model.
Rutherford's model.
Thomson's model
Dalton's model
The modern physics deal with ....
the natural phenomena of the seen system.
the behavior of particles and microsystems.
mechanics
thermodynamic and electromagnetic.
The ionizing energy of hydrogen is......
-3.4 e.v
+13.6 e.v
-1.5 e.v
-13.6 e.v
It is the group of spectral lines its wave length is very long, so it is in the far IR region.
Lyman series
Balmer series
Paschen series
Brackett series
The third orbit for electron in the hydrogen atom divided into .... orbits.
two
three
four
five
