Naturally occurring hydrogen consists of three isotopes, hydrogen-1 (1.01 u),
hydrogen-2 (2.02 u) and hydrogen-3 (3.01 u), where the isotopic masses are given in parentheses. Use the periodic table and determine which isotope is present in the larger percentage in the natural element.
a. Hydrogen-1
b. Hydrogen-2
c. Hydrogen-3
d. Each is present at equal percentages.