Confidence votes 25. The groups in the periodic table tell you what each element within them will react with, the number of valance electrons the element has, and what family it is in. (Ex/ everything in group twelve will react with something that will let it lose two electrons.
Abdullah, Salman and Muqrin are all sons of the founder of modern Saudi Arabia, King Abdulaziz, usually referred to as Ibn Saud, who died in 1953. King Salman called on the royal family's Allegiance Council to recognise Muqrin as his heir.
Saudi Arabia is controlled by a sect of Islam known as Wahabism (Islam has 73 sects). They claim to be true Muslims and practice the values of the prophet, but they do not, as many often marry more than the allowed 4 wives. The rest of the Muslim population do not acknowledge the royal family as Muslims.