That means selenium has 2, 8, 18 and 6 electrons in its first, second, third and fourth atomic orbital, respectively. When Mendeleev first published the original periodic table in 1869 ...

ACS Publications journals Editors are joining in the IYPT celebrations with a series of videos exploring their relationship with the table. Is the periodic table hanging in your lab, classroom, or ...

Test your knowledge and compete with other Live Science readers to see who can come top in our periodic table quiz. The ...

He published his Periodic Table – in all its incomplete beauty ... the most well-known of these being the noble gases (group 18). Here are five facts you might not know about it (despite ...

A new version of the periodic table of elements has predicted hundreds of highly charged ions that could be used to create the next generation of optical atomic clocks. The periodic table ...

Have we reached the end of the line of discoverable elements? Scientists have been slowly extending the periodic table one element at a time, pushing to higher and higher masses, and have ...

the periodic table of elements or sources of energy. Overall, the changes affect some 134 million 11–18-year-olds in India’s schools. The extent of what has changed became clearer last month ...

Want to learn more about this centerpiece of chemistry? Take your pick from this collection of links about elements and the periodic table! Build an element ball, solve periodic puzzles, and check out ...