Arsenic is a chemical element with the symbol As and atomic number 33. Arsenic occurs in many minerals, usually inbination with sulfur and metals, but also as a pure elemental senic is a has various allotropes, but only the gray form, which has a metallic appearance, is important to industry.. The primary use of arsenic is in alloys of lead (for example, in car Cupronickel or copper-nickel (CuNi) is an alloy of copper that contains nickel and strengthening elements, such as iron and e copper content typically varies from 60 to 90 percent. (Monel is a nickel-copper alloy that contains a minimum of 52 percent nickel.)Despite its high copper content, cupronickel is silver in colour. Cupronickel is highly resistant to Gallium is a chemical element with the symbol Ga and atomic number 31. Discovered by French chemist Paul-Émile Lecoq de Boisbaudran in 1875, Gallium is in group 13 of the periodic table and is similar to the other metals of the group (aluminium, indium, and thallium).. Elemental gallium is a soft, silvery metal in standard temperature and its liquid state, it bes silvery white.If you’ve got questions about aluminum bronze, or if you just want to get more familiar with it, this guide is for you. Here we’re diving into the basuding makeup, properties, and applications.. What is Aluminum Bronze? Aluminum bronze is made up of 6-12% aluminum, replacing the tin traditionally used in other types of bronze.