Chap#19 Atomic Spectra Flashcards
1
Q
There are discrete energy levels in atoms. It was first experimentally demonstrated by:
A
Franck Hertz experiment
2
Q
Which of the following sources gives a discrete emission spectrum?
A
Mercury Vapour lamp
3
Q
In which of the following states does the incandescent substance give a continuous spectrum?
A
Solid or fluid in bulk state
4
Q
Band spectrum in produced by:
A
H2
5
Q
Who explained the origin of the Fraunhofer lines?
A
Kirchhoff
6
Q
The nuclear model of the atom was proposed by:
A
E. Rutherford
7
Q
To explain his theory Bohr used:
A
Conservation of angular momentum
8
Q
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom is:
A
Ultraviolet
9
Q
According to classical thoery the proposed circular path of an electron in Rutherford model of atom will be:
A
Spiral
