Trends run through the periodic table, with nonmetallic character (keeping their own electrons) increasing from left to right across a period, and from down to up across a group, and metallic ...

Discover who created the periodic table of elements and how it works. Learn about Dmitri Mendeleev’s contributions, its ...

Elements in group 1 and group 2 are ... The ions formed have a full outer electron shell, so are very stable. See the study guide on groups in the periodic table for more information.

Element 103 in the periodic table is called lawrencium ... metals and placed directly underneath scandium and yttrium in group 3 of the periodic table. How can such disagreement still persist at the ...