The half-life of osmium-183 is 6 hours. How much time would it take for 24 grams of it to reduce to 0.75 grams?

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons