Security Stud. 1  Full mortise hinges are available with security studs for added safety. 2  With the door in its closed position, a stud attached to one leaf of the hinge projects into a hole in the matching leaf.
Net Ionic Equation. A chemical reaction involves the conversion of reactant atoms or molecules to product. During any chemical reaction, reactant molecules are joined together to form a product which has different chemical and physical properties than the reactants.
Unbalanced equations are known as skeletal equations and cannot be used in calculating chemical reactions. Creating a balanced equation rather than using a skeletal equation is very important, as the number of atoms in a chemical compound always remains the same. Atoms cannot be added to or disappear from an equation.