Oxygen is one such element, which exists in nature but in a complex compound that is commonly referred to as air. The air that humans breathe is only partially made up of oxygen, with nitrogen, hydrogen and methane making up the majority of the atmosphere's volume. On the periodic table, there are 109 known elements in the universe.
And in order to cover the most of other countries, they added the 2 dominant languages of west (Spanish) and east (Arabic). I think if there was a rationale in choosing a language as the official language of UN, only Spanish and Arabic are chosen reasonably as they cover more than 50 countries in the world. I am sure the list of official languages in the UN would be quite different if the victorious countries were different.
Although the official languages are Swahili and English, there are actually a total of 62 languages spoken in the country (according to Ethnologue). These mainly consist of tribal African languages as well as a minority of Middle-Eastern and Asian languages spoken by descendants of foreign settlers (i.e.