Polonium-209, an alpha emitter, has a half-life of 102 years. How many alpha particles are emitted in 1.0 s from a 1.0 ng sample of 209Po?

Figure 10-1 study figure 10-1. the strong nuclear force felt by a single proton in a large nucleus

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

Stage in which a star’s outer layers have started to cool and grow outward?