The Periodic Table, first compiled by Russian chemist Dmitri Mendeleyev, is organized by the number of protons in the nucleus of each element's atom, known as the atomic number. The elements are ...

In this activity, students will use the online periodic table, ptable.com, to investigate a number of chemistry concepts. Students will use this online resource to explore information about the ...

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MANY arrangements have been suggested, which include the radio-active elements in the periodic table. So far as I am aware, these have all attempted to confine each space in the table to a single ...

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 ...

Group 7 of the periodic table is something of an oddity. When the first periodic table was formulated by Mendeleev, it was the only group that contained just a single known element — manganese ...

In the final programme in our Elements series, Justin Rowlatt looks at the rarest and oddest members of the periodic table. What are they, and what are they used for? Show more In the final ...

Hello and welcome to our tour of the unusual, exciting and deadly aspects of the elements that make up the world around us. We're kicking off our journey through the Periodic Table with a chemical ...