The nucleus of the element having atomic number math xmlns=http://www.w3.org/1998/Math/MathMLmn2...

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The nucleus of the element having atomic number math xmlns=http://www.w3.org/1998/Math/MathMLmn25/mn/math and atomic weight math xmlns=http://www.w3.org/1998/Math/MathMLmn55/mn/math will contain
(1) math xmlns=http://www.w3.org/1998/Math/MathMLmn25/mn/math protons and math xmlns=http://www.w3.org/1998/Math/MathMLmn30/mn/math neutrons
(2) math xmlns=http://www.w3.org/1998/Math/MathMLmn25/mn/math neutrons and math xmlns=http://www.w3.org/1998/Math/MathMLmn30/mn/math protons
(3) math xmlns=http://www.w3.org/1998/Math/MathMLmn55/mn/math protons
(4) math xmlns=http://www.w3.org/1998/Math/MathMLmn55/mn/math neutrons
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