The average distance of an electron in an atom from its nucleus is of the order of
The proton and neutron are collectively called as
From the following masses, the one which is expressed nearest to the milligram is
Which of the following statement is true
Proton was discovered by
Number of neutron in C12 is
Assertion : Cathode rays are a stream of Î± -particles.
Reason : They are generated under high pressure and high voltage.
Penetration power of proton is
Who discovered that cathode rays are made up of electrons
What is the ratio of mass of an electron to the mass of a proton
Ratio of masses of proton and electron is
Which phrase would be incorrect to us
Assertion : Cathode rays do not travel in straight lines.
Reason : Cathode rays penetrate through thick sheets.
Splitting of signals is caused by
The Heaviest particle is
The minimum real charge on any particle which can exist is
Cathode rays have
The nature of anode rays depends upon
Rutherford experiment prove
Anode rays were discovered by
Which one of the following pairs is not correctly matched
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