Watch Video Solution On Doubtnut App Exercise 9.3. So the answer is False . Download Citation | Concerning the position of hydrogen in the periodic table | The placement of hydrogen in the periodic table has unique implications for fundamental questions of chemical behavior. Definition, mass & chemical names. The placement of hydrogen in the periodic table has unique implications for fundamental questions of chemical behavior. It’s a noble gas. Hydrogen (Z=1) has electronic configuration 1s1. Question 29. For example, argon precedes potassium because argon has atomic number 18 and potassium has 19. Justify the statement. The lanthanoids and actinoids which have properties different from other groups are placed separately at the bottom of the periodic table. Li , K , Na , K, Rb ,Cs and Fr of group 1 of the periodic table. Electronic configurations model how electrons are arranged in atoms. Horizontal rows of the periodic table of elements are the periods. Hydrogen occupies a unique position in the modern periodic table due to the following reasons
(i) Both hydrogen and alkali metals metals have similar outer electronic configuration as both have one electron in the valence shell. Justify the statement. The prime factor is the proton number. Hydrogen gains 1 electron and behaves like electronegative halogens [Group 17 (VIIA)]. Hydrogen is the first element of the periodic table. Hydrogen and alkali metals resemble in the following aspects. Due to the presence of only one electron in its 1s shell, hydrogen exhibits a dual behaviour, i.e., it resembles both alkali metals and halogens. Therefore, the present position of hydrogen in the modern periodic table is not completely justified. Hydrogen is the first element in the periodic table. Ramirez-Torres4 has presented a block form table with hydrogen placed in an isolated group unrelated to either the alkali or halogen elements. Hydrogen resembles alkali metals i.e. Hydrogen loses 1 electron and behaves like electropositive alkali metals [Group 1 (IA)]. Thus, hydrogen was put at the top of the periodic table so that the symmetry of the modern periodic table is not disturbed. are solved by group of students and teacher of Class 10, which is also the largest student community of Class 10. Properties of hydrogen do not completely match any one of the above-mentioned groups. 2) Electropositive character: Like alkali metals ,hydrogen also loses its only electron to form hydrogen ion i.e. Hydrogen Hydrogen is one of the three most abundant elements present on Earth. Its electronic configuration is [1s1]. The position of some elements which were misfit on the basis of atomic mass is now justified on the basis of atomic number. Sometimes hydrogen loses electron like Group I elements and sometimes it gains electrons like those of group VII. Hydrogen resembles the elements of group I-A, IV-A and VII-A in some respects. why is position assigned to hydrogen in the modern periodic table considered anomalous - - TopperLearning.com | 99i8x2fmm Justify the position of Hydrogen in the periodic table? 1) Electronic configuration : Like alkali metals, hydrogen also contains 1 electron in its outermost shell. #class10#periodicclassificationofelements“Hydrogen occupies a unique position in Modern Periodic Table”.Justify the statement. 10 Periodic Table in 8K resolution 11 Other properties of Magnesium Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Hydrogen and alkali metals have similar outer electronic configuration as both have one electron in their outermost shell. 6:37. Modern periodic Law: The properties of elements are a periodic function of their atomic number. Position of an element in periodic table depends upon its electronic configuration and properties. 1. Watch Video Solution On Doubtnut App Exercise 9.2 Write the names of isotopes of hydrogen. He positioned hydrogen in the first column above alkali metals. Accepted Answer: Though hydrogen is a non-metal, it has been placed at the top of group 1 above the alkali metals because its electronic configuration is similar to alkali metals i.e. Its electronic configuration is [1s 1 ]. Electronic configuration: Hydrogen has one electron in its valance shell like the alkali metals H - 1s 1. TRUE/FALSE Medium Published on 21st 08, 2020 Click for even more facts and information on this periodic table element. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Due to the presence of only one electron in its 1s shell, hydrogen exhibits a dual behaviour, i.e., it resembles both alkali metals and halogens. Mendeleev made an early periodic table. So, it belongs to the first group and the first period of the periodic table. Hydrogen occupies a unique position in modern periodic table, justify the statement. Hydrogen has the electronic configuration 1. 32. Due to this property of hydrogen, it can be placed either in group I or group VII. Introduction and Discovery of Hydrogen - Duration: 3:10. Position of hydrogen: The position of hydrogen in his periodic table is not properly defined. (Those frivolous Europeans do not have such limitations, and you can freely buy tritium key chains, tritium fishing lures, probably tritium bellybutton rings if you look hard enough.) Modern Periodic Table; Trends in the Modern Periodic Table; Periods. 2. What is the mass ratio of these isotopes? If the answer is not available please wait for a while and a community member will probably answer this soon. Justify the statement" hydrogen occupies a unique position in modern periodic table".. Metalloids are found in a zig-zag manner between the metals and the non-metals. That’s helium. The position of hydrogen in the traditional form of the periodic table is at the head of Group 1 (the alkali metals) based on the similarity of the valence shells of this family: each of the elements possesses a half-filled s-orbital, namely, H 1s1, Li 2s1, Na 3s1, etc. Hydrogen 1s 1. 9.1 Justify the position of hydrogen in the periodic table on the basis of its electronic configuration On one hand, its electronic configuration is similar to the outer electronic configuration (ns1) of alkali metals.On the other hand, like halogens (having electronic configuration ns2np5 belonging to group 17 of the periodic table), it is short by one electron to the corresponding noble gas configuration (ns2np6). Although Mendeleev arranged the elements in the increasing order of their atomic masses, there were instances where he had placed an element with a slightly higher atomic mass before an element with a slightly lower atomic mass. Hydrogen Ncert Video Solutions - Only On Doubtnut Download Doubtnut Now Exercise 9.1 Justify the position of hydrogen in the periodic table on the basis of its electronic configuration. Ask questions, doubts, problems and we will help you.

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