By 1939, 91 elements were known to exist, including uranium, which has 92 protons in each nucleus and, at the time, the highest atomic number in the periodic table. But element 61 was still not ...

Take the numbers in order from the code sheet and match them to the atomic symbols (one- or two-letter abbreviations) on the filled-in periodic table. Do that, and you’ll get a sentence (after ...

Learn everything you need to know about atomic structure and the periodic table in this science GCSE podcast from BBC Bitesize.

In 1843, Leopold Gmelin worked with the Dobereiner’s system and developed a table of 55 elements that contained many of the similar relationships later found in the modern periodic table. Then in 1857 ...

Atomic weights of 10 elements on periodic table about to make an historic change. ScienceDaily . Retrieved May 9, 2025 from www.sciencedaily.com / releases / 2010 / 12 / 101215133325.htm ...

A new study lays the groundwork to expand the periodic table with a search for element 120, to be made by slamming electrically charged titanium atoms, or ions, into a californium target.

Four synthetic elements on the periodic table received their new names and atomic symbols, chemistry’s international standards organization announced Wednesday. The International Union of Pure ...

Chemistry riddle: Lasers probe nuclear structure of elements to test periodic table’s limit. ... the team provided insight into the structures of the atomic nuclei of fermium (element 100) ...