You're listening to Chemistry in its element brought to you by Chemistry World, the magazine of the Royal Society of Chemistry. Sodium, like most elements in the periodic table could be said to have a ...

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 modern periodic table is based closely on the ideas he ... For example, lithium (Li), sodium (Na) and potassium (K) all have the same kind of reaction with water. The group of elements below ...

2nd Period: Lithium to neon—Electrons go into the second level. After the second level has 8 electrons, the next electron goes into the third level. 3rd Period: Sodium to argon—Electrons go into the ...

On descending a group in the periodic table, on average the outermost electrons get further and further away from the nucleus and as a result, become easier to remove from the atom. This is the trend ...

The Periodic Table, showing naturally occurring elements up to uranium. Shading indicates stellar origin. Image may only be used with appropriate credit.

When the first periodic table was formulated by Mendeleev ... which could be extracted by boiling with sodium hydroxide that also contained a small amount of hydrogen peroxide.