______ stated that the smallest amount of energy that you can add or subtract from a system is a ____________.

______ stated that the smallest amount of energy that you can add or subtract from a system is a ____________.

______ stated that the smallest amount of energy that you can add or subtract from a system is a ____________. 



A. Periodic Law
B. Planck
C. Quantum
D. de Broglie


Answer: B C


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