nonpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.2  Twitter.onpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.
When is a barrel chest a sign of a disease process? Chronic obstructive pulmonary disease (COPD) is the most common instance in which a barrel chest will occur. In these cases, itâs a sign of the lungs being over-expanded. This is caused by the loss of elasticity and results in the person having hyper-inflated lungs.
What causes chest congestion? Chest congestion can be caused by many different things. When the body triggers an immune response against viruses, bacteria, and other infections, it can lead to chest congestion. A cold is the most common cause of chest congestion, but other factors can cause mucus buildup as well as other associated symptoms. The following list covers some well-known chest congestion causes: Smoking