Theory of dual nature of matter was put forward by………..
a) Newton
b) Einstein
c) De Broglie
d) Rutherford
Theory of dual nature was presented in……
a) 1934
b) 1924
c) 1834
d) 1944
Explanation:According to the de Broglie concept of matter waves, the matter has dual nature. It means when the matter is moving it shows the wave property(like interference, diffraction etc.) are associated with it and when it is in the state of rest then it shows particle properties. Thus the matter has dual nature.
Elements are represented by………….
a) name
b) symbols
c) scientific Name
d) none of these
Who introduced the system of naming the elements ?
a) J. Berzilius
b) Newton
c) Bohr
d) Rutherford
Now the total number of elements are……….
a) 119
b) 92
c) 36
d) 118
Natural elements are…………
a) 118
b) 98
c) 84
d) 92
