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.
In a balanced nuclear equation, the sums of the superscripts and the sums of the subscripts must be equal on each side of the equation. EXAMPLE. Write an equation for the decay of calcium-45 to scandium-45.