Derivation of bond length/bond order and bond energy/bond order formulae Bond length/bond order formula for NâO bonds. Development of this formula required a selection of suitable bond lengths for NâO single, double and triple bonds.
Dan Blocker, co-star of the television series Bonanza, died May 13, 1972 of a pulmonary embolism.
Heart block can be caused by: 1  Scarring (fibrosis) of the heart's electrical system caused by aging. 2  Heart attacks. 3  Infection of the heart valves (endocarditis). 4  Complication of Lyme disease.  Sarcoidosis or 1  hemochromatosis. Use of certain medicines, especially beta-blockers, calcium channel blockers, and digoxin.