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.
Covalent Bonds. In a covalent bond, atoms have the ability to combine, which they do by sharing electrons. They may share a pair of electrons or several pairs depending on the elements involved. In the case of two atoms of fluorine that combine to form a molecule, the bond is covalent. By sharing a pair of electrons, the molecule achieves a state in which each atom has an octet of valence electrons. When two atoms of oxygen form a molecule, they form a covalent bond in which they share two pairs of electrons. Conductivity The difference between covalent and ionic bonds explains why water-based solutions of ionic compounds are conductors, whereas water-based solutions of covalent compounds do not conduct electricity.