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Experimental evidence for the existence of the atomic nucleus comes from:
(1) Millikan's oil drop experiment
(2) Atomic emission spectroscopy
(3) The magnetic bending of cathode rays
(4) Alpha scattering by a thin metal foil
Ans: Alpha scattering by a thin metal foil
How many moles of gas occupy 98 L at a pressure of 2.8 atmospheres and a temperature of 292 K?
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excess copper(2)hydroxide solid was placed in a NaOH solution and left until the equilibrium was reached, ph was 10 at 25C Ksp for Cu(OH)2
The expression for Bohr's radius of an atom is: (1) r= n 2 h 2 / 4 Π 2 me 4 z 2 (2) r= n 2 h 2 / 4 Π me 2 z 2 (3) r= n2h2/4 Π me 3
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