1A8AH 2A3A 4A SA 6A 7A HeLi BeCNO F NeВNa Mg 3B 4B 5B 6B 7B r 8B -1B 28 A1 SiP S CI ArK Ca sc Ti v Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br KrRb Sr Y zr Nb Mo Tc Ru Rh Pd Ag cd In Sn Sb Te I XeCs Ba La Hf Ta w Re Os Ir Pt Au Hg TI Pb Bi Po At RnFr Ra Ac Rf Ha**Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Im Yb LuTh Pa u Np Pu Am Cm Bk Cf Es Fm Md No Lr1) The element with an electron configuration of 1s22s22p°3s²3p®4s²3d² is in group |and period2) The element with an electron configuration of 1s22s2p635²3p³ is in group |and period

The principal quantum number determines the period to which the valance electrons belongs to. So it will indicate the period to which the element having such an electronic configuration in its ground state. Electrons are filled in their orbitals in increasing order of their energy. The lower energy orbitals are filled first and then the higher energy. Until unless all lower energy orbitals are completely filled no electron enters into a higher energy level in ground state. Depending on the outer most orbital of the electronic configuration the block to which the element belongs depends and on the basis of number of electrons present the group is determined. (1) The given electronic configuration is: 1s2 2s2 2p6 3s2 3p6 4s2 3d2 The principal quantum number of valance shell is 4. Therefore the element belongs to 4th period. The outermost orbitalis 3d. So the element belongs to d-block and the electrons present are 2 . So the element belongs to 4B group. (2) The given electronic configuration is: 1s2 2s2 2p6 3s2 3p3 The principal quantum number of valance shell is 3. Therefore the element belongs to 3rd period. The outermost orbitalis 3p. So the element belongs to p-block and the electrons present are 3 . So the element belongs to 5A group.

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The element with an electron configuration of 1s²25²2p®3s?3p°4s°3d² is in group | | and period The element with an electron configuration of 1s²2s²2p°3s²3p³ is in group | |and period

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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