How do chemical properties of metals and nonmetals differ? Why is carbon special compared to other elements? Two atoms that are isotopes of one another must have the same number of what? How are chemical elements different from chemical compounds? Isotopes diff...
There's plenty more evidence where that came from, but this will do for starters. It shows us that our theory of what atoms are and how they are built is a very good one: the theory agrees with the things we see around us in the world and it's confirmed by many different kinds of...
howtheTheHow 系统标签: explainemergentanswerbloodpumppage Shortquestionsinthetextbookwithinvertedanswer: و متب بجإتاذيعجر لاةب كلايف ر صق ئسأ. Chapter(1): 1.1-Whichofthefollowinglevelsofbiologicalorganizationincludesallothers...
Nuclear fission can happen spontaneously, in which we case we call it radioactive decay (the conversion of unstable, radioactive isotopes into stable atoms that aren't radioactive). It can also be made to happen on demand—which is how we get energy out of atoms in nuclear power plants. ...