<prompt> According to ADA specification 1 for amalgam, what is the acceptable dimensional change?-20 to 20 microncm-10 to 10 microncm-20 to 10 microncm-10 to 20 microncm  <response>: According to ADA specification 1 for amalgam, the acceptable dimensional change is -20 to 20 microncm.Reference: Marzouk Operative dentistry, pg-108 