Question

what will be the mass of an atom having only one proton and one neutron​

Answer 1

For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons. For most of the 16 lightest elements (up to oxygen) the number of neutrons is equal to the number of protons.

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2.1 Electrons, Protons, Neutrons, and Atoms.

Elementary Particle Charge Mass

Proton +1 1

Neutron 0 1

Electron −1 ~0

Answer 2

Answer:

Protons and neutrons have approximately the same mass, about 1.67 × 10-24 grams, which scientists define as one atomic mass unit (amu) or one Dalton. Each electron has a negative charge (-1) equal to the positive charge of a proton (+1). Neutrons are uncharged particles found within the nucleus.

Explanation:

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