From the Emerging Trends Trade (AUS) – There are a group of elements on Mendeleev’s Periodic Table that few people notice. Everyone knows the basic elements: hydrogen, helium, oxygen, and even gold and silver. Most know some of the more ‘exotic’ elements, such as magnesium, potassium, and lithium. But there are a group of elements which almost no one knows about. These elements are so obscure, their names so unfamiliar, and their importance so under-appreciated, that they are usually grouped separately from the main part of the Periodic Table.