A. 13.60 eV
B. 3.40 eV
C. 0.85 eV
D. 1.51 eV
Ground state energy of the 4th orbit in a H-atom is_____________? Read More »
Atomic Spectra, Physics Mcqs A. continuous spectra for atoms
B. discrete spectra for atoms
C. either continuous nor discrete
D. no spectrum
Which one of following postulate is in accordance with the Rutherfords model ? Read More »
Atomic Spectra, Physics Mcqs A. radiate electromagnetic energy with a continuous distribution of wavelength
B. absorb particular wavelengths when white light is incident on them
C. radiate electromagnetic energy of discrete characteristic wavelength
D. emit either invisible or visible light
A. photo electric effect
B. ionization
C. shadow photograph
D. any of above
In obtaining an X-ray photograph of our hand we use the principle of______________? Read More »
Atomic Spectra, Physics Mcqs A. 1st to 5th orbit
B. 2nd to 5th orbit
C. 3rd to 5th orbit
D. 4th to 5th orbit
A. band spectrum
B. line spectrum
C. continuous spectrum
D. absorption spectrum
The radiations emitted form hydrogen filled discharge tube show____________? Read More »
Atomic Spectra, Physics Mcqs A. three
B. four
C. five
D. six
Total number of series in hydrogen spectrum is_____________? Read More »
Atomic Spectra, Physics Mcqs A. of unknown nature
B. high energy electrons
C. high energy photons
D. radio isotopes
X-ray are________________? Read More »
Atomic Spectra, Physics Mcqs A. its energy levels are too close to each other
B. its energy levels are too far apart
C. it is too small in size
D. it has a single electron
Hydrogen atom does not emit X-rays because _________________? Read More »
Atomic Spectra, Physics Mcqs A. 10-10s
B. 10-8s
C. 10-6s
D. 10-9s
Excited atoms return to their ground state in_______________? Read More »
Atomic Spectra, Physics Mcqs