Meaning & History. Derived from Latin leo lion, a cognate of LEON. It was popular among early Christians and was the name of 13 popes, including Saint Leo the Great who asserted the dominance of the Roman bishops (the popes) over all others in the 5th century.It was also borne by six Byzantine emperors and five Armenian kings.erived from Latin leo lion, a cognate of LEON. It was popular among early Christians and was the name of 13 popes, including Saint Leo the Great who asserted the dominance of the Roman bishops (the popes) over all others in the 5th century. It was also borne by six Byzantine emperors and five Armenian kings.
Combustion: A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide.These reactions are exothermic, meaning they produce heat. An â¦. 4 people found this useful.ombustion: A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide. These reactions are exothermic, meaning they produce heat. An â¦. 4 people found this useful.
Combination Reactions In a combination reaction the atoms and/or molecules do what the name implies: they combine to form the product. Combination reactions are always exothermic.For example barium metal and fluorine gas will combine in a highly exothermic reaction to form the salt barium fluoride: Another example is given by magnesium oxide combining with carbon dioxide: Often, reaction can fall into more than one category.ombination Reactions In a combination reaction the atoms and/or molecules do what the name implies: they combine to form the product. Combination reactions are always exothermic.