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.
1 Prior nosebleed-the blood from a nosebleed may have been swallowed causing later coffee ground vomit. 2  Swallowed blood-results in coffee ground consistency. 3  Throat condition. 4  Blood in sputum-blood from the lungs may have been coughed up and swallowed.