What happens if an atom gains 2 electrons to fill its valence shell a. it becomes more stable and will have 2+ charge b. it becomes more stable and will have a 2- charge c. it becomes less stable and will have a 2+ charge d. it will become an entirely new element

Chicken pox and hepatitis are bacterial diseases. true or false?

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle

Which units ate used to measure both velocity and speed? check all that apply