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A longstanding mystery of the periodic table involves a group of unique elements called lanthanides. Also known as rare earth ...

Casey Harrell, who lost his voice to ALS 5 years ago, can now communicate in real time thanks to an interface which turns ...

Today’s guest op-ed authors are Dennis Howard and Roger Best of Global Sports Insights, an Oregon-based company specializing ...

Another theory suggests that dreams are simply a side effect of memory consolidation —the brain’s way of replaying and ...

The periodic table of elements, or Mendeleev’s table, was created in 1869 by Russian chemist Dmitri Mendeleev. This table organizes all known chemical elements by their atomic number, ...

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 .

Dmitri Mendeleev, the Russian chemist who published what is regarded as the first widely recognised periodic table, has been celebrated with his own Google doodle on what would have been his 182nd ...

Evolution of the Periodic Table. When Mendeleev first published the original periodic table in 1869, it contained only 63 elements — about half as many as there are today.

In the process, Mendeleev introduced the concept of “atomic numbers”, assigning these numbers to reflect the position of each element in the periodic table. Mendeleev’s other innovation was ...