How many neutrons does an element have of its atomic number is 50 and its mass number is 156?

Match the lithification processes. 1. contact pressure causing grains to "grow" together 2. increase in density due to weight of overburden 3. precipitation of bonding agents between grains a. recrystallization b. cementation c. compaction

The force required to make an object travel along a circular path is

In an exothermic chemical reaction the energy gained by the surroundings must be the energy lost by the reaction