A certain atom has atomic number z 20 and atomic mass, Ask an Expert

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A certain atom has atomic number Z = 20 and atomic mass number A = 42.

(a) What is the approximate radius of the nucleus of this atom?

rnucleus = _______ m

(b) What is the magnitude of the electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus.

F = _______N

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