An international governing body has adopted a new definition of atomic mass (aka atomic weight) changing from specific values to intervals of masses to resolve 15 years of debate on one of the ...

For nearly a century, scientists around the world have been searching for dark matter—an invisible substance believed to make ...

Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

Scientists build mass-producible miniature quantum memory element Researchers at the University of Basel have built a quantum memory element based on atoms in a tiny glass cell.

The modern version of this chemical element chart has been tweaked to account for the quantum theory that governs the arrangement of electrons surrounding the nucleus and the outermost electrons that ...

Manvendra memorised each element’s name, atomic number, and atomic mass, accurate to two decimal places, and recited them ...

First 20 elements of the periodic table: This article provides a comprehensive list of the first 20 elements in the periodic table along with their atomic numbers and symbols.

The relative atomic mass of an element is a weighted mean mass of the isotopes of an element compared with that of the 12C isotope, which has a mass of exactly 12.

Atomic Number and Atomic Mass Atomic Number: The atomic number of an atom is determined by the number of protons it has. It uniquely identifies each element on the periodic table.

118 Elements and Their Symbols and Atomic Numbers: find the topic and its symbol with atomic number. Download or read complete content here.

Atomic Heart 2 has been officially announced by developer Mundfish with brand-new RPG elements as well as a new MMO game.