Objective Question Papers
Chapter 12: Atoms
Que 1: An atom stays in an excited state for about:
Que 2: The energy equivalent to one atomic mass unit is :
Que 3: Who explained the splitting of special lines in magnetic field?
Que 4: The mass of a neutron is:
Que 5: Isobars have the same:
Que 6: Isotones have the same:
Que 7: Half-life of a substance depends on:
Que 8: The concept of electron spin was introduced by:
Que 9: The principle that a quantum orbital cannot be occupied by more than two electrons was given by:
Que 10: For ionization of excited Hydrogen atom, the required energy is:
Que 11: According to Bohr’s theory of hydrogen atom, the radius (r) of stationary orbits are related to principal quantum number (n) as:
Que 12: Fg and Fe represents the gravitational and electrostatic force respectively between two electrons situated at some distance. The ratio is of the order of:
Que 13: Artificial radioactivity was discovered by:
Que 14: P-decay produces:
Que 15: Natural radioactivity was discovered by:
Que 16: Transmutation of nuclei was discovered by:
Que 17: The energy equivalent to mass defect is called:
Que 18: The total energy that will be released if a nucleus is built from its constituents is called the:
Que 19: The binding energy of He is about:
Que 20: The binding energy of a deuteron is about:
