18. Which one of the following sets of quantum numbers is not possible? A.4 3 -2 +12 B.3 0 1 -1/2 C.3 0 0 +1/2 D. 2 1 1 -1/2 E.2 0 0 +1/2 19. What is the maximum number of electrons in an atom that can have the following set of quantum numbers? n-4-3 m =-2 m, +1/2 A) 0 B) 1 C) 2 D) 6 E) 10 20. Electrons in an orbital with /-3 are in a/an A) d orbital. "B) forbital. C) g orbital. D) p orbital. E) s orbital. 21. The number of orbitals in a d subshell is A) 1 B) 2 C) 3 -D) 5 E) 7 22. "No two electrons in an atom can have the same four quantum numbers" is a statement of D) de Broglie's relation. E) Dalton's atomic theory. - A) the Pauli exclusion principle. B) C) Bohr's equation. Hund's rule. 23. The orbital diagram for a ground-state nitrogen atom is 2s A B._ CRP PPP DL 24. Which ground-state atom has an electron configuration described by the following orbital diagram? [Ne] 1 3s 111 3p A) phosphorus B) nitrogen C) arsenic D) vanadium E) none of these 25. How many unpaired electrons does a ground-state atom of sulfur have? A) 0 B) 1 C) 2 D) 3 E) 4 26. Which element has the following ground-state electron configuration? [Kr]5s'4d³ A) Mn B) Mo C) Nb D) Re E) Te 27. The electron configuration of a ground-state copper atom is A) [Ar]4s 4d B) [Ar]4s4p 3d +C) [Ar]4s 3d D) [Ar]3d' E) [Ar]4s'3d