Write the ground state electron configuration, determine how many inner (core),
ID: 503236 • Letter: W
Question
Write the ground state electron configuration, determine how many inner (core), outer, and valence electron are present in an atom of each of the following elements? Example: Fe = [Ar] 4s^2 3d^4 has 18 core electrons; 2 outer electrons 8 valence electrons. a) O b)Sn c) Cr d) Se e) Sr Which element in the following set would you expect to have the lowest IE_3 (onization energy for 3rd electron)? Why? a) K, Ca, Sc b) Na, Mg, Al c) Al, Li, B Write the condensed ground state electron configuration of the transition metal ion Hf^2+. Is it a paramagnetic or diamagnetic? identify the element that a) forms a 2+ ion with electron configuration [Ar] 3d^3 b) is of period 5 that forms 3+ ion with noble gas configuration c) is of the period 4 transition metal that forms 3+ diamagnetic ion. d) is of the period 4 transition metal that forms 2+ ion with a half-filled d sublevels. e) is of the period 3 whose 2- ion is isoelectronic with Ar. Which of the following species are isoelectronic with Ne? circle Li Na^+ Li^+ Mg^2+ F Ca Al^3+ Rank the following in order of increasing atomic radius? Li, Na^+, Li^+ Mg^2+, F, Ca, Al^2+ What is the maximum number of electrons that can occupy each of the following sublevels? a) 3p b) 5d c)2s d) 4f (a) For n=4, what are the possible values of l? (b) For I=2, what are the possible values of m_I? (c) If m_4 is 2, what are the possible values for I?Explanation / Answer
1)
O = atomic number 8 = [He] 2s2 2p4 2 core electrons, 6 outer electrons, 6 valance electrons
Sn = atomic number 50 = [Kr] 4d10 5s2 5p2 36 core electrons, 4 outer electrons, 4 valance electrons
Cr = atomic number 24 = [Ar] 4s1 3d5 18 core electrons, 1 outer electron, 5 valance electrons
Se = atomic number 34 = [Ar] 3d10 4s2 4p4 18 core electrons, 6 outer electrons, 6 valance electrons
Sr = atomic number 38 = [Kr] 5s2 36 core electrons, 2 outer electrons, 2 valance electrons
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