In heavy water, each hydrogen atom is indeed heavier, with a neutron as well as a proton in its nucleus. This isotope of hydrogen is called deuterium, and heavy water's more scientific name is ...

Hydrogen forms an hcp solid at low temperatures, melting at - 259.2 C and boiling at - 252.7 C. The atomic configuration of the atom is (1s) 1, and it has an ionic radius of 0.208 nm. Three isotopes ...

There are three isotopes of hydrogen: hydrogen, deuterium (hydrogen-2) and tritium (hydrogen-3): if the atom loses one or more electrons, it becomes a positively-charged ion if the atom gains one ...

The nucleus of each atom contains protons and neutrons. While the number of protons defines the element (e.g., hydrogen, carbon, etc.) and the sum of the protons and neutrons gives the atomic mass, ...

MESSRS. R. P. BELL and J. H. Wolfenden 1 have recently given their experience in concentrating the hydrogen isotope, namely, that nickel, platinum and copper are about equally efficient as ...

The most common isotope of hydrogen is protium (name rarely ... the study of the energetics and bonding of the hydrogen atom played a key role in the development of quantum mechanics.

A much rarer isotope of hydrogen is hydrogen-2, or deuterium. Hydrogen-2 atoms are made up of one proton and one neutron. Water is made up of two hydrogen atoms and one oxygen atom, bonded together.

An element's atomic number defines it. An element with 17 protons will always be chlorine. However an element's mass numbers can vary, which means that it can have different numbers of neutrons.