- A chemical element is a chemical substance that cannot be broken down into other substances. The basic particle that constitutes a chemical element is the atom, and each chemical element is distinguished by the number of protons in the nuclei of its atoms, known as its atomic number. For example, oxygen has an atomic number of 8, meaning that each oxygen atom has 8 protons in its nucleus. This is in contrast to chemical compounds and mixtures, which contain atoms with more than one atomic number.
- Tyre (Wikipedia)
Tyre (/ˈtaɪər/; Arabic: صُور, romanized: Ṣūr; Phoenician: 𐤑𐤓, romanized: Ṣūr; Greek: Τύρος, translit. Týros) is a city in Lebanon, one of the oldest continually inhabited cities in the world, though in medieval times for some centuries by just a tiny population. It was one of the earliest Phoenician metropolises and the legendary birthplace of Europa, her brothers Cadmus and Phoenix, as well as Carthage’s founder Dido (Elissa). The city has many ancient sites, including the Tyre Hippodrome, and was added as a whole to UNESCO’s list of World Heritage Sites in 1984. The historian Ernest Renan noted that “One can call Tyre a city of ruins, built out of ruins”.