1. The elements in s and p block have only the outer valence shell incomplete. They are also called Typical Elements to distinguish them from the transition and inner transition series. These repeating properties have been used to separate the elements into four s. These s are s-, p-, d-, and f-. 2)s sub shell has only 1 orbital which can accommodate only 2 electrons, therefore, there are only two groups of s block elements. Some of the elements in this column also react vigorously with water and must be stored carefully. Outer electronic configuration of s-block: ns1-2. What are S Block Elements? These elements lie in the middle of periodic table between s and p-blocks (i.e., between group 2 and group 13). The s- and p- block elements are called main group elements or representative elements. They also have a silver-like shine and are great conductors of heat and light. Answer : In alkali metals, on moving down the group, the atomic size increases and the effective nuclear charge decreases. The s block elements having only one electron in their s-orbital are called group one or alkali metals whereas the s block elements having two electrons filling their s-orbital are called group two or alkaline earth metals. These elements lie in between s-block and p-block elements. ], From Simple English Wikipedia, the free encyclopedia, Wikipedia:How to write Simple English pages, "Electron Configuration for all the elements in the Periodic Table", https://simple.wikipedia.org/w/index.php?title=S-block&oldid=7236803, Pages needing to be simplified from February 2012, Articles with unsourced statements from February 2012, Creative Commons Attribution/Share-Alike License. The elements in group two are called the alkaline earth metals. Francium is considered to be the most rare naturally occurring element on earth. They are called representative elements because they have well-known elements in the periodic table. The electron in their most outward electron shell are in the s-orbital. s-block has two groups (1 and 2). The characteristic properties of the elements that belong to these four blocks are described in Chapter 4 and thereafter. Going down the group, the first ionisation energy decreases. Why is s block and p block elements called representative elements? The modern periodic law says that "The … As we will study the properties of all these one by one in this chapter will be able to know about the great importance and applications of these elements. In general, they are shiny, silvery, good conductors of heat and electricity. Log in. These are so called because they form hydroxides on reaction with water which are strongly alkaline in nature. All of the s- elements are metals (except Hydrogen). In this unit, we study their properties, uses, important compounds and biological importance. There is a maximum of two electrons that can occupy the s orbital. The s-block consists of two groups—Group 1 and Group 2, … The s-block is one of four blocks of elements in the periodic table. They are named so due to the alkaline nature of the oxides and hydroxides. The melting and boiling points of lithium are higher. The modern periodic law says that "The properties of elements are periodic function of their atomic number." Since s-subshell has only one orbital which can accommodate only two electrons, therefore there are only two groups of s-block elements. Join now. The 13 elements of the IA and IIA Group located in the leftmost and two vertical columns in the amplified periodic table are called elements of S-block. The s-block and p-block elements are so called because their valence electrons are in an s orbital or p orbital respectively. For example, the group 12 elements zinc, cadm… s-Block, p-block, and Group 12 elements are called main group elements and d-block elements other than Group 12 and f-block elements are called transition elements. Not everyone agrees on the exact membership of each set of elements. Anomalous Behaviour of Lithium Element blocks are named for their characteristic orbital, which is determined by the highest energy electrons: S-block: The first two groups of the periodic table, the s-block metals: Are either alkali metals or alkaline earth metals. The word alkali named from Arabic, which means "The Ashes". s-Block, p-block, and Group 12 elements are called main group elements and d-block elements other than Group 12 and f-block elements are called transition elements. Question 40: Assertion Radium is most abundant s-block element. d.Alkali metals also form complex hydrides such as LiAlH4 which is a good reducing agent.Alkali metal hydrides do not exist in water and this reaction with any other agent is carried out in protic solvent. They are called the s-block elements because s-orbitals are being filled, in their outermost shells. The s-Block Elements Class 11 Notes Chemistry Chapter 10 • General Electronic Configuration of s-Block Elements For alkali metals [noble gas] ns 1 For alkaline earth metals [noble gas] ns 2 • Group 1 Elements: Alkali metals Electronic Configuration, ns 1, where n represents the valence shell. They are called transition elements because of their position in the periodic table. Answer. They are purely metallic , as they lose the electrons from the outermost shell readily , they are highly reactive metals and they have low ionization energy . 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