Mass number is the sum of:

 

 

A) Electrons and Protons B) Protons and neutrons C) Electron and neutrons D) Only ptotons

in an atomic nucleus, the nuclear force binds ______________________________ together.

a)neutrons

b)neutrons and protons

c)protons

d)neutrons and protons and electrons

e) electrons

Which of the following particles are found in the nucleus of an atom?

(a) Protons and electrons.

(b) protons and neutrons.

(c) Electrons and neutrons.

(d) Neutrons and positrons.

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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