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.
The term Riviera Maya is fairly new and has varied definitions, but it starts approximately 10 miles south of Cancun at the seaside village of Puerto Morelos and includes places like Playa del Carmen, Puerto Aventuras, Akumal, and Tulum.It ends at the town of Carrillo Puerto.ayan Riviera. The Mayan Riviera is comprised of the area just south of the tip of the Yucatan Peninsula in Mexico. It stretches along 75 miles of the Mexican Caribbean coastline in the southeastern part of of the Yucatan Peninsula.