A maximum sum of the number of neutrons and protons in an isotope of hydrogen is 3

 

Solution: True

Concept: Isotopes are the atoms of the same element, with the same number of protons and electrons but a different number of neutrons  Isotopes of hydrogen are Protium H¹₁, Deuterium H²₁ Protium, and tritium H³₁ isotope of the element hydrogen is the only one stable atom that does not have neutrons in its nucleus

Hence, Maximum sum of the number of neutrons and protons in an isotope of hydrogen is 3