![]() It usually forms a covalent bond, unlike other metals in the s- block. Hydrogen is a gas and has just one electron in it. They are metals, except for Hydrogen, the first member of the group. S - block elements consists of 1 and 2 group of the periodic table. Main Group Elements Chemistry S- block elements Let's discuss one of the parts of the long form of the periodic table that is known as main group elements. ![]() Later William Odling intrigued by atomic weights and the periodicity of the elements. Alexandre Beguyer de Chancourtois was first recognized periodicity in the physical properties of the elements in 1862. Now we know about long form of the periodic table of elements but long back there was no information about all elements. Now we have a long form of the periodic table which is a tabular arrangement of element on the basis of atomic number. So when you want to know about any element, you can collect all information by seeing that arrangement. There should be some way to arrange these elements. Terms like atomic number are mass number play an important role for collecting information about the elements. You have learnt about atom, molecule ad compound. Has there been something like a bookstore in chemistry? Have you known that there are total 114 elements discovered till today. Therefore you can easily check the location of the books. ![]() They are arranged on shelves accordingly. In book stores all books are arranged into various categories and sub-categories. Then how come he brought a desired book this much quickly. You asked for a book and shopkeeper gave you within a minute. ![]() Remember your last visit of a book store to purchase a book. ![]()
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