What is Theory that describes movement of land masses?

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils

When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two

What is the volume of 3.2 moles of chlorine gas (cl2) at 295 k and 1.1 atm?