The hurricane re-strengthened to Category 4 status with maximum sustained winds near 130 mph (210 kph). The U.S. National Hurricane Center said Irma was expected to gain a little more strength as it moved through the Straits of Florida and remain a powerful hurricane as it approached Florida. As of 4 a.m. EDT Sunday, the hurricane was centered about 55 miles (90 kilometers) south-southeast of Key West, Florida, and was moving northwest at 6 mph (9 kph).
An organic compound always contains carbon. A few exceptions are carbon monoxide, carbon dioxide, carbonates, cyanides, cyanates, carbides, and thyocyanates, which are considered inorganic. Examples of organic compounds are carbohydrates, lipids, proteins and nucleic acids.
Types of Compounds. Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms, in the case of polyatomic ions) gains or loses electrons. A cation is a positively charged ion. An anion is a negatively charged ion. Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral. Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion).