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WorksheetsAtomic Structure Revision
Total questions: 15
Worksheet time: 15mins
Which of the following statements is not included in Bohr's postulate?
Electron at its orbit will not be absorbed or released any energy
Electron moves in a circular orbit around the nucleus
When an electron absorbed energy, it will excite to higher energy level but it is unstable and hence the electron will fall to a lower energy level
Electron at certain energy level has certain amount of energy and the energy is not quantized
An electron at excited state falls to a lower energy level and produce a green line spectrum during the transition. What is the series of the line spectrum formed?
Lyman
Balmer
Paschen
Pfund
Calculate the wavelength produced when an electron in hydrogen atom is transferred from n=6 to n=2.
4.844 x 10-19 m
4.102 x 10-17 m
4.862 x 10-7 m
410.20 m
What is the energy of photons associated with radiation that has a frequency of 3.818 x 1015 Hz ?
1.045 x 10 -25 J
1.524 x 10 6 J
2.530 x 10 -18 J
6.564 x 10 -7 J
Calculate the frequency of the first line in the Lyman series.
2.47 x 1015 s-1
4.57 x 1014 s-1
1.60 x 1014 s-1
7.40 x 1013 s-1
Which of the following lines in Brackett series have the shortest wavelength?
First line
Fourth line
Third line
Second line
All the following pairs are correct EXCEPT
A
B
C
D
Which of the following statements describes the weakness of Bohr's theory?
Predict the energy level of most atoms
Explain the spectrum of hydrogen ion
Explain the hydrogen spectrum that consists only one electron
It cannot explain the lines in hydrogen spectrum
Which of the following subshell does not exist?
1s
2p
3f
4p
Determine the orbital with:
principal quantum number = 5
azimuthal quantum number = 2
magnetic quantum number = 0
5s
5dxz
5px
5d
Give a set of four quantum numbers for an electron in 3py orbital
(3, 0, 0, ±1/2)
(3, 1, 0, -1/2)
(3, 1, -1, ±1/2)
(3, 2, 0, ±1/2)
Choose the correct electronic configuration of Mn with proton number of 25
1s22s22p63s23p63d54s2
1s22s22p63s23p64s13d5
1s22s22p63s23p63d64s1
1s22s22p63s23p64s13d6
The correct electronic configuration of 26Fe3+ is
1s22s22p63s23p63d5
1s22s22p63s23p64s23d3
1s22s22p63s23p63d34s2
1s22s22p63s23p64s13d4
Calculate the energy change for the formation of the line with the lowest energy in Paschen series.
1.06 x 10-19 J
2.42 x 10-19 J
3.03 x 10-19 J
2.66 x 10-20 J
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