<prompt> The stiffness of a dental gold alloy is determined by its:Proportional limitModulus of elasticityUltimate tensile strengthFlow  <response>: ELASTIC MODULUS YOUNGS MODULUS OR MODULUS OF ELASTICITYThe word stiffness should come to mind upon reading one of these three terms in the dental literature. Elastic modulus describes the relative stiffness or rigidity of a material, which is measured by the slope of the elastic region of the stress-strain graph.Reference: PHILLIPS SCIENCE OF DENTAL MATERIALS, 12th ed page no 53 