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Position of Hydrogen,Helium,Lanthanides and Actinides are exceptional in the periodic table explain why. |
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Answer» The lanthanides and actinides form a group that appears almost disconnected from the rest of the periodic table. This is the f BLOCK of elements, known as the inner transition series. This is due to the proper numerical position between Groups 2 and 3 of the transition metals.Hydrogen doesn't have a fixed position in the periodic table. ... Hydrogen atom has the e- configuration 1s1 and is the first ELEMENT to be placed as PER the rule. It is placed with alkali metals because it can loose its one e- to form H+ just LIKE the alkali metals. but hydrogen also resembles HALOGENS. |
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