Symptoms. In type 2 diabetes, many people have no symptoms at all. As type 2 diabetes is commonly (but not always) diagnosed at a later age, sometimes signs are dismissed as a part of âgetting olderâ. In some cases, by the time type 2 diabetes is diagnosed, the complications of diabetes may already be present.ymptoms. In type 2 diabetes, many people have no symptoms at all. As type 2 diabetes is commonly (but not always) diagnosed at a later age, sometimes signs are dismissed as a part of âgetting olderâ. In some cases, by the time type 2 diabetes is diagnosed, the complications of diabetes may already be present.
Sugar is made of covalent bonds between nonmetals-carbon, hydrogen and oxygen. It exhibits some classic properties of covalent compounds; it is a brittle solid, it has a relatively low melting point and is a poor conductor of heat and electricity.
For instance, covalent bonds are key to the structure of carbon-based organic molecules like our DNA and proteins. Covalent bonds are also found in smaller inorganic molecules, such as H 2 O \text H_2\text O H 2 O H, start subscript, 2, end subscript, O, C O 2 \text {CO}_2 CO 2 C, O, start subscript, 2, end subscript, and O 2 \text {O}_2 O 2 O, start subscript, 2, end subscript.