Chem 210 Final exam study guide Questions & Answers(Rated A)

What is ground state electron configuration of Co? [Ar]3d^9 [Ar]4s^1 3d^8 [Ar]4s^2 3d^7 [Ar]4s^2 4p^6 4d^1 - ANSWER[Ar]4s^2 3d^7 molybdenum has an anomalous electron configuration. using the shorthand notation for electron configurations, write the electron configuration A) [kr]5s 4d^6 B) [kr]5s 4d^0 5p^6 C) [kr]5s^1 4d^5 D) [kr]5s^2 4d^4 - ANSWERC) [kr]5s^1 4d^5 the symbol [Kr] represents a) 4s^2 4p^6 b) 1s^2 2s^2 2p^6 3s^6 4s^2 4p^6 c) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 D)1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 4d^10 - ANSWERc) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 What is the wavelength of UV light in the balmer series when m=2 and n=7? a) 0.00252 nm b) 397 nm c)337 nm d)0.00297 nm - ANSWERb) 397 nm How many electrons can a single orbital hold? A) 2n B) 2 C) 2l+1 D)8 - ANSWERB) 2 What are the possible values of I and m1 for an electron in a 5d orbitial? A) I=0 and mI=0 B) I=3 and MI=-2,-1,0,+1, or +2 c) I=1 and MI=-1,0,+1 D) I=2 and MI=-2,-1,0,+1, +2 - ANSWERD) I=2 and MI=-2,-1,0,+1, +2 What is the the de Broglie wavelength of an electron (m=9.11e-31 kg) moving at a velocity of 3.0e7m/s? a) 3.9e-12 b)2.4e-11 c)3.3e-8