Atoms — Physics STD 12 Science — Question

Curie temperature is the temperature above which:

Of the following pairs of species which one will have the same electronic configuration for both members?

When a radioactive substance emits an a -particle, its position in the periodic table is lowered by(a) One place(b) Two places(c) Three places(d) Four places

When cathode rays (tube voltage ~ 10 kV) collide with the anode of high atomic weight then we get(a) Positive rays(b) X-rays(c) Gamma rays(d) Canal rays

Like coulomb force, ______ also satisfies superposition principle.

The rest energy involved in a mass of one atomic mass unit is _________ eV.

To explain his theory, Bohr used(a) Conservation of linear momentum(b) Conservation of angular momentum(c) Conservation of quantum frequency(d) Conservation of energy

When light is refracted from air into glass(a) Its wavelength and frequency both increase(b) Its wavelength increases but frequency remains unchanged(c) Its wavelength decreases but frequency remains unchanged(d) Its wavelength and frequency both decrease