1. What is the atomic mass of hydrogen if 99.985% is hydrogen-1 and 0.015% is hydrogen-2?

Question

asked Dec 11, 2021 40.3k views

1 Answer

Phred Menyhert · Answer 1 · 2021-12-17T09:22:22+0000

The atomic mass of Hydrogen : 1.02985

Isotopes are elements that have the same Atomic Number (Proton)

Atomic mass is the average atomic mass of all its isotopes

In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu

An atomic mass unit = amu is a relative atomic mass of 1/12 the mass of an atom of carbon-12.

Mass atom X = mass isotope 1 . % + mass isotope 2.% ..

99.985% is hydrogen-1 and 0.015% is hydrogen-2

The atomic mass of Hydrogen :

$\tt atomic~mass~H=0.99985* 1+0.015* 2\\\\atomic~mass~H=1.02985$