Hydrogen is a gas in group IA of the periodic table with atomic number 1 ... and tritium with one proton and two neutrons in the nucleus.

Forget 10 Downing Street or 1600 Pennsylvania Avenue, the most prestigious address in the universe is number one in the periodic table, hydrogen ... neutron in the nucleus and tritium with two ...

The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and one electron in the region outside the nucleus. The electron and proton are attracted to each other.

Currently, there are 118 known elements on the periodic table, from hydrogen all the way to oganesson ... the isotope plutonium-244 with additional neutrons and vaporized ions of titanium.

Scientists at ORNL used neutrons to see hydrogen atoms, flashing in green, ending a decades-long debate about an enzyme that could target aggressive cancers through inhibitor design. Disclaimer ...