Welcome to your Ncert - class 9- science - Chapter 4 – Structure of the Atom 2
The nucleus of helium contains
Which of the following is not a correct statement according to Rutherford's atomic model?
If an electron moves away from nucleus, its potential energy:
How many sub-atomic particles are present in an α- particle used in Rutherford's scattering experiment?
The ratio of the radii of the first three Bohr orbits is:
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
Goldsteins experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of:
Which of the following statements about Rutherford’s model of atom are correct?
The introduction of a neutron into the nuclear composition of an atom would lead to a change in:
Neutron is a fundamental particle carrying:
The radius of the first Bohr orbit of hydrogen atom is
Which one of the following is considered as the main postulate of Bohr's model of atom
The expression for Bohr's radius of an atom is
Bohr's theory can be applied to determine the?
The presence of electrons outside the nucleus and nucleus at the centre of the atom was suggested by:
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