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The Hasanids (Arabic: بنو حسن, romanized: Banū Ḥasan or حسنيون, Ḥasaniyyūn) are the descendants of Hasan ibn Ali, brother of Husayn ibn Ali and grandson of Muhammad. They are a branch of the Alids (the descendants of Ali ibn Abi Talib ), and one of the two most important branches of the ashrāf (the other being the descendants ...
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Hasan and Husayn are recognized as the second and the third Imams in Shia Islam, their descendants being known as the Hasanids and the Husaynids, respectively. [4] They are revered by all Muslims as the progeny of Muhammad and honored by nobility titles such as Sharif and Sayyid . [ 5 ]
Elements in groups 1–2 or 13–18, excluding hydrogen * Transition elements are sometimes referred to as transition metals † Although the heavier elements of groups 15 (Mc), 16 (Lv), 17 (Ts) and 18 (Og) have been notionally assigned to the indicated groups their chemical properties have not yet been experimentally confirmed.
In the periodic table of the elements, each column is a group. In chemistry, a group (also known as a family) [1] is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.
Group 8 is a group (column) of chemical elements in the periodic table. It consists of iron (Fe), ruthenium (Ru), osmium (Os) and hassium (Hs). [ 1 ] " Group 8" is the modern standard designation for this group, adopted by the IUPAC in 1990. [ 1 ]
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
The Ghassanids, [a] also known as the Jafnids, [2] were an Arabian tribe. Originally from South Arabia , they migrated to the Levant in the 3rd century and established what would eventually become a Christian kingdom under the aegis of the Byzantine Empire , [ 3 ] [ 4 ] as their society merged with local Chalcedonian Christianity and was ...