Platinum is a chemical element, which is commonly called Platinum and belongs to the platinum group. Its chemical symbol Pt is one of the precious metals. Platinum alloy The atomic weight is 195.078, which is slightly smaller than the atomic weight of…

read more

Calcium is a metallic element, symbol Ca, located in the fourth periodic period of the chemical periodic table, Group IIA, and is a silvery-white crystal at normal temperature. Animal bones, clams, and eggshells contain calcium carbonate. Alloy can be used for the deoxidizer, oils dehydrating agent, a…

read more