How to pronounce “atomic mass” in English

- Is everywhere, and we particularly use a type of hydrogen called deuterium, which is a heavier isotope of hydrogen. Hydrogen is typically one proton and oneelectron, atomic mass of one. Deuterium is an atomic mass of two, which is a proton, which is a charged particle, and it has a neutron inits nucleus, which is an uncharged particle. And so that's deuterium.