Adeuterium nucleus contains which of the following? a. one proton b. one electron and one neutron c. one proton and one electron d. one proton and one neutron

Deuterium is an isotope of hydrogen with the symbol: ₁H²

Atomic number = number of protons = number of electrons

Atomic mass  = protons + neutrons

In the case of deuterium:

Number of protons = 1

Number of electrons = 1

Number of neutrons = 1

Therefore, all the options are correct.

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