Assertion : Cathode rays do not travel in straight lines.
Reason : Cathode rays penetrate through thick sheets.
e/m ratio was determined by
Magnitude of K.E. in an orbit is caused by
The minimum real charge on any particle which can exist is
Proton was discovered by
The average distance of an electron in an atom from its nucleus is of the order of
One would expect proton to have very large
Assertion : Cathode rays are a stream of Î± -particles.
Reason : They are generated under high pressure and high voltage.
The nucleus of the atom consists of
From the following masses, the one which is expressed nearest to the milligram is
Which of the following statement is true
The density of a neclear of an atom is
Which is correct statement about proton
The proton and neutron are collectively called as
Cathode rays are made up of
If uncertainty in position and momentum are equal, then uncertainty in velocity is:
Maximum number of electrons in a subshell of an atom is determined by the following:
The nucleus of helium contains
The total number of atomic orbitals in fourth energy level of an atom is:
The orbital angular momentum of a p-electron is given as:
Ratio of masses of proton and electron is
Who discovered that cathode rays are made up of electrons
The nature of anode rays depends upon
Maximum number of electrons in a subshell with:
Number of neutron in C12 is
Which one of the following pairs is not correctly matched
Splitting of signals is caused by
The Heaviest particle is
Rutherford experiment prove
What is the ratio of mass of an electron to the mass of a proton
Which phrase would be incorrect to us
Penetration power of proton is
The atomic number of Ni and Cu are 28 and 29 respectively. The electronic configuration (1s)^2 (2s)^2 (2p)^6 (3s)^2 (3p)^6 (3d)^10..
[Ar] (3d)^10, (4s)^1 electronic configuration belongs to
Cathode rays have
Anode rays were discovered by
Impossible orbital among the following is
Electron density in the yz plane of 3d(x^2 y^2) orbital is
Non-directional orbital is
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