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12. What happens to the number of electrons, neutrons and protons when it is in its charged state?
A. An atom has the same number of protons and neutrons
B. An atom has the same number of electrons and protons
C. An atom has the different number of electrons and protons
D. An atom has the same number of neutrons, protons and electrons

14. Electrons has a mass of 9.109 x [tex]10^{-29}[/tex] while proton has a mass of 1.672 x [tex]10^{-2}[/tex]? From this information which statement below is TRUE?
A. Electrons are heavier than protons.
B. Electrons are lighter than protons.
C. Protons and electrons have the same mass in kilograms
D. Protons cannot be determined if it is heavier than electrons