please help with questions 8 9 10 and 11 please.... D) effective nuclear H) 9 Pl

Question

please help with questions 8 9 10 and 11 please....

D) effective nuclear H) 9 Please answer bth Part A and Part B Eash part a worth 2 points PART A What is the electron confguration of the neutralbum atom Ba? PART B: What as the olectron contiguration of the barium catisn Ba 7 2-1-93- 10. Zine (atomic number 30) as A 3° core electors vd vaece electors B 30 core electrons and t vaience electrons 30 core electrons and 2 valence electrons D. 28 core electrons and 2 vaience electrons E. 2 core electrons and 30 vaience electrons 11. How many unpaired valence electrons does an atom of arsenic have (atomic number 33)? A. 0 B. 1 C. 2 2 How many covalent bonds can a carbon atom form? A 1 B. 2 C. 3 D. 4 E. 8

Explanation / Answer

Question 9

Electronic configuration of Barium : 1s2 2s22p63s2 3p6 3d104s2 4p6 4d105s2 5p6 6s2

Electronic configuration of Ba2+ : 1s2 2s22p63s2 3p6 3d104s2 4p6 4d105s2 5p6 6s2

Part A : 2 -8 - 18-18-8 -2

Part B :   2 -8 - 18-18-8

Question 10

electronic configuration of Zinc is [Ar] 3d10 4s2 atomic number is 30

Hence the valence electron shell 4s orbital which has 2 electron.

Question 11

[Ar] 3d10 4s2 4p3

Hence it has 3 valence electrons

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