Question

An isotope of hydrogen with zero neutrons.

Answer 1

Answer:

protium

Explanation:

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Answer 2

Answer:

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deuterium

Hydrogen has no neutron, deuterium has one, and tritium has two neutrons. The isotopes of hydrogen have, respectively, mass numbers of one, two, and three. Their nuclear symbols are therefore 1H, 2H, and 3H. The atoms of these isotopes have one electron to balance the charge of the one proton.