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 ...

and produced several Periodic Tables between 1864-1870. His first table contained just 28 elements, organised by their valency (how many other atoms they can combine with). These elements were almost ...

Going down group 1, the melting point decreases. Lithium, Li Fizzes steadily; slowly becomes smaller until it disappears Sodium, Na Fizzes rapidly; melts to form a ball; quickly becomes smaller ...

Gethin: And today we're going to be looking at the periodic table. Let's take a look at some Group 1 metals then - also known as alkaline metals. Fran: Group 1 elements are called the alkali metals.

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, ...

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.

Scientists at Stanford Medicine are advancing the understanding of schizophrenia by creating a "periodic table" for ...

This year marks the 150th anniversary of the publication of Mendeleev’s Periodic Table of Chemical Elements in 1869. In celebration, the United Nations Educational, Scientific, and Cultural ...