Q. State Heisenberg Uncertainty
Principle.
Ans. It
is impossible to measure simultaneously both the position and momentum (or
velocity) of a microporticle with certainty.
Q. What is wave mechanical model of the atom ?
Ans. A
model which takes into account the wave and particle nature of the electron.
This model was proposed by an Austrian Physicist E. Schrodinger in 1926.
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