We often learn something new from studying something old. More than 150 years before Mark Zuckerberg used the term the “social graph” to describe your network of connections on Facebook, a ...

The periodic table - AQA Mendeleev made an early periodic table. In the modern periodic table, elements are in order of atomic number in periods and groups. Electronic structures model how ...

Such questions exercised physicists greatly in the decades after Dmitri Mendeleev introduced his periodic table of the chemical elements in 1869. They received new impetus around the turn of the ...

In 1869, Mendeleev's first periodic table did not include them, as closed-shell elements remained undiscovered until Lord Rayleigh and William Ramsey isolated argon in 1894. Remarkably ...

An atom is so small that a single drop of water contains more than a billion atoms. Although tiny, atoms are mostly empty space. The simplified model of the atom is that of a cloud of negative ...

🔬 Fun Fact Friday! 🔬 Did you know that Mendeleev’s periodic table had gaps? When Dmitri Mendeleev created the first periodic table in 1869, he intentionally left blank spaces for elements ...

After a year of fastidious planning, a microscopic sample of the ultra-rare radioactive element berkelium arrived at a ...

The pioneering nuclear chemist Glenn Seaborg discovered berkelium at Berkeley Lab in 1949. It was one of many achievements ...

Researchers have discovered brand new interference patterns in twisted two-dimensional tungsten ditelluride lattices. These so-called moir patterns can be tuned to look like periodic spots or even one ...