- Krypton (from Ancient Greek: κρυπτός, romanized: kryptos ’the hidden one’) is a chemical element; it has symbol Kr and atomic number 36. It is a colorless, odorless noble gas that occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Krypton is chemically inert.
- Hispaniola (Wikipedia)
Hispaniola (/ˌhɪspənˈjoʊlə/, also UK: /-pænˈ-/) is an island between Cuba and Puerto Rico in the Greater Antilles of the Caribbean. Hispaniola is the most populous island in the West Indies, and the second-largest by land area, after Cuba. The 76,192-square-kilometre (29,418 sq mi) island is divided into two separate sovereign countries: the Spanish-speaking Dominican Republic (48,445 km2 (18,705 sq mi) to the east and the French and Haitian Creole–speaking Haiti (27,750 km2 (10,710 sq mi) to the west. The only other divided island in the Caribbean is Saint Martin, which is shared between France (Saint Martin) and the Netherlands (Sint Maarten).
- Rubidium (Wikipedia)
Rubidium is a chemical element; it has symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium. Rubidium is the first alkali metal in the group to have a density higher than water. On Earth, natural rubidium comprises two isotopes: 72% is a stable isotope 85Rb, and 28% is slightly radioactive 87Rb, with a half-life of 48.8 billion years – more than three times as long as the estimated age of the universe.
- Bromine (Wikipedia)
Bromine is a chemical element; it has symbol Br and atomic number 35. It is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour. Its properties are intermediate between those of chlorine and iodine. Isolated independently by two chemists, Carl Jacob Löwig (in 1825) and Antoine Jérôme Balard (in 1826), its name was derived from the Ancient Greek βρῶμος (bromos) meaning “stench”, referring to its sharp and pungent smell.