Undergraduate students are eligible for membership if they rank in the upper fifth of their class and have completed at least sixty-four semester hours of college work, seventeen semester hours of which shall be in one of the sciences recognized by Beta Kappa Chi with a grade average of at least B in the science area and a general college average of at least B; graduate students are eligible if they have completed at least fifteen semester hours in one of the sciences recognized by the Society with a grade average of A in at least one-third of the hours and at least B in the remaining two-thirds semester hours.