In this study, we predict that layered Sc2C is stable using an evolutionary algorithm and experimentally explore the phase diagram around the desired composition. We then explore the electronic structure of the synthesized material, and compare it to Y2C and Al2C to understand periodic trends. We find that as the cation becomes more electronegative, the band gap opens with Y2C as a semimetal, Sc2C as a small band gap semiconductor, and Al2C as a larger gap semiconductor. The synthesized layered Sc2C is the first 2D electride with semiconducting properties, opening up a fascinating new class of electride materials with several possible applications in hydrogen storage and batteries.