Question

How does bohrs model illustrate the arrangement of electrons in an atom?

Answer 1

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$\large \textbf {\underline {Bohar's \: model \: of \: an \: atom}}$

(i) An atom is made up of three particles : electrons have negative charge, protons have positive charge whereas neutrons have no charge, they are neutral.

(ii) Due to the presence of equal number of negative electrons and positive protons the atom on the whole is electrically neutral.

(iii) The protons and neutrons are located in the small nucleas at the center of the atom. Due to the presence of protons, nucleus is positively charged.

(iv) The electron revolve rapidly around the nucleus in fixed circular path called energy levels or shells (denoted either by the numbers 1, 2, 3, 4, 5 and 6 or by the letters K, L, M, N, O and P) counted from the center outwards.

(v) Each energy level (or shell) is associated with the fixed amount of energy (the energy increasing from the center outwards) .

(vi) There is no change in the energy of electrons as long as they keep revolving in the same energy level.

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