Which element has the following ground state electron configuration? B O C Be Si

Question

Which element has the following ground state electron configuration? B O C Be Si Which element has the following ground state electron configuration?. Fe Co Ni Cu Zn What ix a possible set of quantum numbers for an unpaired electron m the orbital n= 1, l = 1, m_t = -1, m_s = +1/2 n= 4, l = 2, m_t = -1, m_s = +1/2 n= 5, l = 2, m_t = -2, m_s = +1/2 n= 5, l = 0, m_t = 0, m_s = -1/2 n= 5, l = 1, m_t = -1, m_s = +1/2 What 2 - ino has the following ground state electron configuration? oxide ion nitride ion fluoride ion sulfide ion magnesium ion An arsenic atom has valence electrons. 3 5 6 8 33

Explanation / Answer

13. c> C for Carbon atomic no 6. e conf 1s2 2s2 2p2

14. a> Fe for Iron atomic no 26. e conf 3d6 4s2

15. e> n=5 l=1 m=-1 s= +1/2

16. d> sulphide ion

17. b> 5 valence electrons

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