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.
Shape of chest: A barrel chest is the change in shape of a chest due to emphysema. When the lungs get destroyed from smoking (most often), it is hard to blow the air out of the lungs, which causes the lungs to get bigger with the trapped air. Thus, the chest changes shape to look like a barrel.. ...Read more