Drawbacks of neil bohr's atomic model?

Answer 1

1. It could not explain the atomic spectram energy of the elements other than 'HYDROGEN'.

2. It could not explain the brightness of the atomic spectral lines.

3. It could not explain the formation of chemical bonds.

4.

Answer 2

In light of the current state of knowledge in the field of Chemistry, Dalton's theory had a few drawbacks. According to Dalton's postulates,

· an atom is the smallest indivisible particle of an element. However, it is now known that atoms can further be subdivided into elementary particles like electrons, protons, and neutrons.

· atoms of the same element are identical in all respects, having the same size, shape and structure, and especially mass. Today, we know that atoms of the same element can have slightly different masses. Such atoms are called isotopes.

· atoms of different elements have different properties and different masses. However, different elements do exist whose atoms have the same mass. Such atoms are called isobars.

Answer 3

His theory is actually very close to the theory that chemists use today. However

(1) many of his formulas are wrong. In some cases this is because he did not have enough evidence to get an answer, so he made the simplest assumption, e.g. water = OH rather than our modern H2O. In other cases it is because he was not a good experimentalist, and some of his chemical analyses were just plain inaccurate.

(2) he had a view of the structure of molecules (he called them compound atoms) quite different from the structures that we know about today. For example, oxalic acid, which a modern chemist would write something like

HO(C=O).(C=O)OH he described as a compound atom made up of carbon monoxide, carbon dioxide, and water CO.CO2.H2O in modern notation.