WorksheetsChemistry STPM : Electronic Structure Of Atom
Total questions: 11
Worksheet time: 21mins
Which of the following electron transition occurs in the ultraviolet range of the elctromagnet spectrum?
n3 to n1
n3 to n2
n4 to n3
n2 to n3
Which of the following electron transitions in the hydrogen atom has the highest frequency?
n3 to n1
n4 to n2
n5 to n3
n7 to n2
How many lines can be formed in the ultraviolet range for all the transitions involving the first seven energy levels in the emission spectrum for the hydrogen atom?
18
10
7
6
For the hydrogen atom, the electron transition with the longest wavelenght is
n3 to n1
n4 to n2
n5 to n1
n7 to n5
What is maximum number of possible lines formed for all the transitions involving the first six energy levels in the emission spectrum for the hydrogen atom?
15
11
6
5
The emission spectrum of hydrogen atom is a line spectrum because
energy is required to excite an electron
electrons which are unstable will radiate energy
an excited electron has a higher energy and is not stable
the energy of an electron an a hydrogen atom is quantised
An electron is exited from the energy level n=2 to the energy n=6. Which of the following statements is correct?
The electron will achieve a higher stability
The electron cannot return to the energy level n=1
This transition produces a dark line in the violet region of visible light
Energy with a frequency corresponding to that of green light is absorbed
One of the lines in the spectrum of hydrogen atom has a wave number of 7.80 x 1014 s-1. What is the frequency of this line? (c = 3 x 108 ms-1)
2.34 x 1014 s-1
2.34 x 1013 s-1
3.84 x 1014 s-1
3.84 x 1013 s-1
Which of the following statements is true about the Lyman and Balmer series?
The intensity decreases as the frequency increases.
The converging frequency for both series is the same.
The line spectra for both series are formed in the visible light range.
The spacing between the lines increases as the frequency increases.
An excited electron residing in the energy level n = 4 drops to n = 1. What is the wavelenght of the emission if the frequency is 3.09 x 1015 Hz? (c = 3 x 108 ms-1)
4.69 x 10-6 m
2.91 x 10-7 m
3.88 x 10-7 m
9.71 x 10-8 m
Which of the following statements regarding the hydrogen atom spectrum is not correct
The single electron in hydrogen jumps to higher energy levels.
The energy of an electron in a hydrogen atom is quantised.
Hydrogen is the only element that can produce an atomic spectrum.
When an electron has the smallest allowable amount of energy, it is in the ground state.
