The molecule BeCl2 is described as having a linear shape because the atoms have bonded at a 180-degree angle. This creates the appearance of a straight line.
BeCl2 is also known as beryllium chloride, and it has the appearance of yellow or white hexagonal crystals. It is a binary ionic compound because it is a molecule made up of metal and nonmetal elements, namely beryllium and chlorine. It is classified as a triatomic molecule because it is made up of three atoms, two chlorine molecules on either side of a single beryllium atom. The molecule is created by treating beryllium with hydrogen chloride.