From ancient coins to modern markets, gold has shaped money and value for centuries. Here's why, among all the elements, it has remained the world's store of value.

On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table. He ...

Cations are ions that are positively charged. Anions are ions that are negatively charged. Ions are charged atoms or molecules. If a balanced atom loses one or more electrons, it will become a ...

The economy, dissatisfaction with the country, helped Democrats win key seats. Tuesday night was a far cry from the shell-shocked scenes in Democrats' election headquarters a year ago this November.

Cascade PBS helps your community explore new worlds and ideas through programs that educate, inform and inspire. Your ...

Chlorine is more reactive than the iodine in potassium iodide solution: When a Group 7 element reacts, it gains one electron to form a negative ion with a stable electronic configuration – a full ...

They must be stored under oil to prevent them reacting with the air or water vapour. All Group 1 elements react with water to produce a metal hydroxide and hydrogen. This is the equation for the ...