Question

write summary of bohr's atomic model

Answer 1

The Bohr model shows the atom as a small, positively charged nucleus surrounded by orbiting electrons. Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element.

Answer 2

Postulates of Bohr's model:

1)Electrons revolve around the nucleus in fixed orbits. Each orbit is associated with a certain amount of energy hence named 'energy levels'.

2)The integer n represents the various energy levels-1,2,3...starting from the innermost. The levels are also designated as K, L, M, N...

3)As long as the electrons rotates in one of the energy levels it neither loses nor absorbs energy. When energy is supplied initially to the atoms an electron moves to an orbit of higher energy.When this electron drops back to the original orbit energy is radiated by the atom according to the equation E²-E¹[which are energy states of the electron in higher and lower orbit].

Bohr's model gave the preciseness of location & mode of rotation of electrons around the nucleus.