Question

Bohr's model of atom is contradicted by
1) Pauli's exclusion principle
2) Plancks Quantum theory
3) Heisenberg uncertainity principle
4) All the above​

Answer 1

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HERE IS YOUR ANSWER:-

Bohr's model of atom is contradicted by Heisenberg's Uncertainty principle.

This is so because according to Bohr's theory, each electron in an atom has a particular circular orbit. Thus, it has a precise momentum and position.

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Answer 2

Answer:

Ice floats on water because of less density as compared to water.