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.
Most of the dialects are related to dialects and languages common in neighbouring countries such as China, Myanmar and Thailand. The only foreign language that is used to some degree is French-a result of the French occupation of the country, but even this is restricted to Vientianeâs elite.