Final answer:
The concept of ease of pronunciation is relevant when naming chemical compounds, where prefixes are used to create clear and pronounceable names. However, the initial question on which element is used for ease of pronunciation does not directly relate to standard chemical principles.
Step-by-step explanation:
The given question does not seem to pertain directly to chemical principles or the use of elements in ease of pronunciation. However, when it comes to ease of pronunciation in the context of chemistry, it is relevant when naming chemical compounds. When naming binary compounds consisting solely of nonmetals, prefixes are used to designate the number of atoms of each element. The use of prefixes in chemical nomenclature helps to create names that are easier to pronounce and clearly indicate the composition of the compound.
For example, the compound SF6 is named sulfur hexafluoride for ease of pronunciation and clarity. Similarly, the compound N2O3 is named dinitrogen trioxide. These names follow the nomenclature rules outlined in chemistry, such as using the appropriate prefix for the second element and changing the ending of the second element's name to '-ide.' Also, the 'a' or 'o' at the end of a prefix is usually dropped when the name of the element begins with a vowel, e.g., 'tetroxide' instead of 'tetraoxide.'