23. Which of the following sets of quantum numbers is not allowed (invalid)? d. n=2, L...

Question:

23. Which of the following sets of quantum numbers is not allowed (invalid)? d. n=2, L = 1, m L = 1, ms =-1/2 24. How many of the following elements have 1 unpaired electron in the ground state? Al CI d. 4 25. Which of the following electron configurations is not possible? a. 1 b. 2 c. 3 a. 1s22s22p5 b. 1s22s22p3 c. 1s22s22p2 d. 1s22s1 e. 1s22s32p 26. Which of the following properties, in general, decrease as we move down a group in the periodic table? 1. lonization energy 2. Atomic radius 3. Electronegativity a. 1 only b. 2 only c 3 only d. 2 and 3 only e. 1 and 3 only 27. How many lone pairs of electrons exist in the Lewis bond structure of sO32? a. 12 b. 10 c 8 d. 7 e. 6 28. What is the formal charge on the carbon atom in COs2-? a. +2 b. +1 CO d-1 e. -2

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