Definition. A nuclear stress test measures blood flow to your heart at rest and while your heart is working harder as a result of exertion or medication.
Not all atoms bond the same way, so we need to learn the different types of bonds that atoms can form. There are three (sometimes four) recognized chemical bonds; they are ionic, covalent, polar covalent, and (sometimes) hydrogen bonds.ow letâs take a look at how these atoms and molecules hold together. Bonds hold atoms and molecules of substances together. There are several different kinds of bonds; the type of bond seen in elements and compounds depends on the chemical properties as well as the attractive forces governing the atoms and molecules.
The types of bond funds and how they are categorized may be best understood by revisiting the basics of bonds. 1  Bonds are essentially IOUs issued by entities, such as the US Government or corporations, and bond mutual funds are primarily categorized by those entities who want to borrow money by issuing bonds: 1  Government Bond Funds invest in various types of US Treasury bonds. 2  Municipal Bond Funds invest in various types of Municipal bonds.