Feel free to add your predictions in the comments. Hydrogen atom has a mass of 1.008 atomic units, which is why October 8 of each year is celebrated as Hydrogen Day in the United States ...

The relative mass of a nucleus is the number of protons ... deuterium (hydrogen-2) and tritium (hydrogen-3): if the atom loses one or more electrons, it becomes a positively-charged ion if the ...

The size of the atoms and their mass has a lot to do with the density of the substance Another factor is how the atoms are arranged in the substance. Polyethylene is made up only of carbon and ...