The shared valence electrons between two nonmetal atoms is called a covalent bond. Covalent bonds are formed when two atoms begin sharing electrons. The electrons are attracted to the positively charged nuclei of the atoms. A dipole results when electrons in a covalent bond are not shared evenly between the two atoms.ovalent bonds are formed when two atoms begin sharing electrons. The electrons are attracted to the positively charged nuclei of the atoms. A dipole results when electrons in a covalent bond are not shared evenly between the two atoms.
Low blood pressure, often caused due to dehydration is another cause of faintness and light headed feeling. Episodes of light headedness often trigger in summers or on exposure to high temperatures are linked with dehydration and fall in blood pressure.
Another way to describe lightheadedness is as a âreeling sensation.â Lightheadedness may be accompanied by clouded vision and a loss of balance. While not always cause for concern, lightheadedness can sometimes indicate an underlying medical condition and can increase your risk for experiencing a fall. For this reason, you should take caution when you feel lightheaded. Lightheadedness often occurs when you move quickly from a seated to a standing position.