Scattering of α-particles by a thin gold foil suggests the presence of
A. electron in an atom
B. proton in an atom
C. positively charged nucleus at the centre of an atom
D. isotopes of gold
Answer: Option C
A. electron in an atom
B. proton in an atom
C. positively charged nucleus at the centre of an atom
D. isotopes of gold
Answer: Option C
. . . . . . . . invented Atom Bomb.
A. J Robert Oppenheimer
B. John Bau a Ning
C. Samuel Cohan
D. Samuel Colt
A. when low speed electrons is ejected
B. when high speed electron is obstructed by a metal surface
C. when anode-ray obstructed by a solid object
D. when γ-ray is obstructed by a solid object
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