JEE Main 2009Annual, Paper 1ChemistryMediumAtomic Structure113× since 2002
In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity
with which the position of the electron can be located is (h = 6.6 10⁻³⁴ kg m²s⁻¹, mass of electron, e_m = 9.1 10⁻³¹ kg)