“In particular, some observed asteroids surpass this mass density threshold. Especially noteworthy is the asteroid 33 ...

This video is an interactive lesson in calculating an atom’s mass and atomic number. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of ...

A magnificent period piece from mid-19th-century Russia has just received a bit of a renovation. Five elements at the heart of the periodic table will never look the same again, following an update to ...

The periodic table captures a subtle pattern that runs through the chemical elements, the fundamental building blocks of everything around us: from the aluminium in bike frames to the xenon gas in ...

Who would have guess that a molecule of hydrogen and getting a blowjob would have the same atomic number? First created by Russian chemist Dmitri Mendeleev in 1869, the Periodic Table of the Elements ...

University of Nottingham’s chemistry professor Martyn Poliakoff says that most chemists don’t know the atomic number of most elements and that it’s a pain to look in the periodic table. That’s why ...

CORRECTION: On Jan. 7, 2016, this story was changed to correct the atomic number for livermorium and to clarify that IUPAC was the group that gave temporary names to the new elements. With the ...

Welcome to the world, elements 113, 115, 117 and 118! Four new elements will join more than a hundred others on the periodic table of the elements, the International Union of Pure and Applied ...

You'll find it on the wall of nearly every school chemistry laboratory in the land. And generations of children have sung the words, "hydrogen and helium, lithium, beryllium..." in an attempt to ...