By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. At standardized conditions for temperature and pressure, two atoms of the element bind to form dioxygen, a diatomic gas that is colorless, odorless, and tasteless, with the formula O 2.xygen constitutes 49.2% of the Earth's crust by mass and is the major component of the world's oceans (88.8% by mass). Oxygen gas is the second most common component of the Earth's atmosphere, taking up 20.8% of its volume and 23.1% of its mass (some 10 15 tonnes).
Riviera, Mediterranean coastland between Cannes (France) and La Spezia (Italy). The French section comprises part of the CÃ´te dâAzur (which extends farther west), while the Italian section is known to the west and east of Genoa as the Riviera di Ponente and the Riviera di Levante, respectively.
Nice: Arriving & Departing. Nice: Arriving & Departing. Most travelers' first point of arrival and departure from the French Riviera is the Nice Cote d'Azur International Airport ( NCE ) . The NCE airport services the eastern part of Provence , and whether your onward mode of travel is by car, bus or train, understanding the airport is the key.