Physics 125A Lecture 35: Lecture 35

Does a nucleus designated as contain,

(a) 20 neutrons and 20 protons,

(b) 22 protons and 18 neutrons,

(c) 18 protons and 22 neutrons,

(d) 18 protons and 40 neutrons,

(e) 40protons and 18 neutrons,

Does a nucleus designated as  contain (a) 20 neutrons and 20 protons, (b) 22 protons and 18 neutrons, (c) 18 protons and 22 neutrons, (d) 18 protons and 40 neutrons, or (e) 40 protons and 18 neutrons?

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