Carpenters often cut wood at the construction site. Carpenters construct and repair building frameworks and structuresâsuch as stairways, doorframes, partitions, rafters, and bridge supportsâmade from wood and other materials. They also may install kitchen cabinets, siding, and drywall.
Beryllium is a chemical element with symbol Be and atomic number 4. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Within the cores of stars beryllium is depleted as it is fused and creates larger elements. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium include beryl (aquamarine, emerald) and chrysoberyl.
Beryllium is mostly used as an alloy when combined with elements like copper, nickel and aluminum, it forms materials that are lighter, tougher and more corrosion resistant than similar alloys.he fourth element on the periodic table, beryllium is certainly less well known than some of its single-digit neighbours like oxygen and helium. But this obscure element has many high tech fans and is poised to become an essential material of the future.