how many protons are in molybdenum 10/Apr/2016 Molybdenum WikipediaThere are 35 known isotopes of molybdenum, ranging in atomic mass from 83 to 117, as well as four metastable nuclear isomers Seven isotopes occur naturally, with atomic Lis
DEFINITION of 'Elective-Deferral Contribution'. A contribution arrangement of an employer-sponsored retirement plan under which participants can choose to set aside part of their pretax compensation as a contribution to the plan. Also known as salary-deferral or salary-reduction contributions.. Next Up.
DEFINITION of 'Catch-Up Contribution'. A type of retirement savings contribution that allows people over 50 to make additional contributions to their 401(k) and/or individual retirement accounts.REAKING DOWN 'Catch-Up Contribution'. Originally, the ability to make catch-up contributions under EGTRRA was set to end at around 2011. However, the Pension Protection Act of 2006 made catch-up contributions and other pension-related provisions permanent.