1. hydrogen-a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe. atomic number 1, H. tritium-a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms.ymbol H A colorless, odorless, highly flammable gaseous element that is the lightest and most abundant element in the universe. It occurs in water in combination with oxygen, in most organic compounds, and in small amounts in the atmosphere as a gaseous mixture of its three isotopes (protium, deuterium, and tritium).
The Kaaba is built around a sacred black stone, a meteorite that Muslims believe was placed by Abraham and Ishmael in a corner of the Kaaba, a symbol of God's covenant with Abraham and Ishmael and, by extension, with the Muslim community itself.
It is the most sacred site in Islam. It is considered the House of God and has a similar role as the Tabernacle and Holy of Holies in Judaism and Christianity. Wherever they are in the world, Muslims are expected to face the Kaaba when performing salat (prayer).From any point in the world, the direction facing the Kaaba is called the qibla. The sanctuary around the Kaaba is called Al-Masjid al-Haram (Sacred Mosque).One of the Five Pillars of Islam requires every Muslim who is able to do so to perform the hajj pilgrimage at least once in their lifetime.herever they are in the world, Muslims are expected to face the Kaaba when performing salat (prayer). From any point in the world, the direction facing the Kaaba is called the qibla. The sanctuary around the Kaaba is called Al-Masjid al-Haram (Sacred Mosque).