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What would increase the mass of the Helium atom, without changing its identity? A) add a neutron B) remove a proton C) add a proton D) add an electron
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What would increase the mass of the Helium atom, without changing its identity?

A) add a neutron
B) remove a proton
C) add a proton
D) add an electron

User TryingToImprove
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A because protons make the atom the element it is and the molar mass is made up by the neutrons and protons. The protons must stay the same to keep the same element and electrons hardly have mass so A
User Aequalsb
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