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.
Formula Rules for Ionic Compounds. always contain positive and negative ions. the sum of the charges of the positive ions (cations) must always equal the sum of the charges of the negative ions (anions) î î î.