February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements ...

Ever since physicist Ernest Rutherford discovered the atomic nucleus in 1911, studying its structure and behavior has ...

On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.

The periodic table organizes chemical elements based on atomic weight, electron configurations, and chemical properties, ...

1. Periodic Table as Arranged by Mendelejeff attention to the fact that “the eighth element, starting from a given one, is a kind of repetition of the first, like the eighth note of an octave in ...

The 2024-25 Premier League table is tight from top to bottom as another season of chaos approaches its climax. [ MORE: Premier League 2024-25 schedule, how to watch live] There are so many big ...

You can take delight in the amazing colors of the gemstones, but through chemistry, you can also see how nature creates those colors using an endless variety of complex structures made with the ...

MORE - UEFA Champions League hub — Format, schedule, more The schedule was longer, the table bigger, and we’ve now seen how chaotic a final matchday can look, with all 18 games played at the same time ...

How do we calculate mass and atomic numbers? VideoHow do we calculate mass and atomic numbers? This video is an interactive lesson in calculating an atom's mass and atomic number.