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 ...

which states that the properties of the chemical elements exhibit a periodic dependence on their atomic numbers. The table is divided into four roughly rectangular areas called blocks. The rows of the ...

The questions in this quiz are suitable for GCSE chemistry students studying the physical and chemical properties of group 0 elements (noble gases), group 1 elements (alkali metals) and group 7 ...

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

Meyer was just four years older than Mendeleev, and produced several Periodic Tables between 1864-1870. His first table contained just 28 elements, organised by their valency (how many other atoms ...

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

When the first periodic table was formulated by Mendeleev, it was the only group that contained just a single known element — manganese. In the early twentieth century, several claims were made ...

The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

Rutherfordium, the 104th element on the periodic table, was first synthesized artificially ... is afforded the right to name it, but when two groups have competing discovery claims this becomes ...