Question

what quantum mechanical theory

Answer 1

Here is ur anwer;- 

Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level. The nature and behavior of matter and energy at that level is sometimes referred to asquantum physics and quantum mechanics.  


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Answer 2

Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level. The nature and behavior of matter and energy at that level is sometimes referred to as quantumphysics and quantum mechanics