Q.1: In 1886, E. Goldstein discovered the presence of new radiations in a gas discharge and called them ___________.
a) canal rays
Q.2: J. J. Thomson was awarded the Nobel Prize in Physics in 1906 for his discovery of ____________.
Q.3: ________’s atomic theory suggested that the atom was indivisible and indestructible.
Q.4: Thomson’s model of an atom proposed that ____________________.
a) Atom consists of a positively charged sphere and electrons are embedded in it.
b) Negative and positive charges are equal in magnitude, thus making atoms electrically neutral.
c) Both ‘a’ and ‘b’
Q.5: The mass of ________ is approximately 2000 times as that of the electron.
Q.6: The charge of an electron is _________.
a) plus one
c) minus one
Q.7: ___________ are doubly…
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