Across the broad range of sciences the personal attributes required by students vary little with a strong logical brain being the main component required. Obviously the sector is wide and positions are varied, but recruiters will be looking for candidates who have good numerical, analytical and problem solving skills. On top of this your lateral thinking and communication attributes are what science employers are looking for.
If you are specialising within your subject then strong lab and technical attributes will be required. A strong knowledge of your subject and enthusiasm for your work key traits to provide evidence of to employers