The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

The table shows the melting points of five alkali metals. Use this information to describe how melting point changes in group 1.

Can France claim the first periodic table? Probably not, but a French Geology Professor made ... bromine), and tellurium similar to the group 6 elements (oxygen, sulphur, selenium), so he swapped them ...

By comparing colors across samples, we might be able to determine the real culprit. The green chemistry principle of atom economy ... As part of the ChemClub's 10 th Anniversary, we asked clubs to ...

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As with all elements on the periodic table, the element's number corresponds ... green men and incredible spacecraft, we're ...