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.
Some potential causes of a heavy feeling in the head include: 1. Head and Neck Injuries. As mentioned before, head and neck injuries can both cause a heavy head feeling, due to damage to your brain or muscles. Sometimes your head feels heavy and numb as a result of the muscle strain as well. 2. Fatigue. If youâre out of shape or donât get enough exercise, then itâs possible that your heavy head feeling is due to fatigue and poor health.