Which of the following statements is true?

A.) Protons have a mass that contributes significantly to the mass of the atomic nucleus.

B.) Neutrons do not have a mass that contributes significantly to the mass of the atomic nucleus.

C.) Neutrons have a mass that contributes significantly to the mass of the atomic nucleus.

D.) Electrons have a mass that contributes significantly to the mass of the atomic nucleus.

Question

Which of the following statements is true?
		
A.) Protons have a mass that contributes significantly to the mass of the atomic nucleus.
		
B.) Neutrons do not have a mass that contributes significantly to the mass of the atomic nucleus.
		
C.) Neutrons have a mass that contributes significantly to the mass of the atomic nucleus.
		
D.) Electrons have a mass that contributes significantly to the mass of the atomic nucleus.

abmon98 · Answer

Atoms consist of Neutrons, electrons and protons.
Nucleus contains protons(positively charged) and neutrons(0 charged-neutral). Nucleus is surrounded by orbitals, orbitals are regions of space in which electrons move.

           relative mass	  relative charge
proton	1	                +1
neutron	1	                  0
electron	1/1836	        -1
 
No of protons = ATOMIC NUMBER of the atom
No of protons + no of neutrons = MASS NUMBER of the atom