How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude.

How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude.


A. about a decade


B. about a century


C. about a thousand years


D. since Aristotle


The answer is :

B. about a century


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