What is the heaviest element?
The heaviest element that occurs in nature is uranium, #92. It is radioactive. Scientists can make even heavier elements using a very fancy machine called a “cyclotron.” They have made element #118, which doesn’t have a name yet, because people like to fight about what to name new elements. But when they make new elements this way, they only make a few atoms, and it only lasts a fraction of a second before it goes bad. So you can’t ever see it or hold it. By heaviest, you could also mean the “densest” element. “Density” means something’s mass compared to its size, so dense things are heavy even though they are small. And osmium is the densest element! (I had to bring up osmium again.) 7. Do you have a t-shirt with the periodic table on it? I used to, when I was in high school. It was white, with a blue periodic table. But I don’t have it anymore. 8. What is your favorite color? Why? My favorite color changes sometimes. Usually it is blue or green or black. Right now it is green, becaus
