1)If the ground state electron configuration of an element is [Ar]3d"48-4p*, what is the typical charge on the monatomic anion of the element? a) 4+ b) 2+ c) 1- d) 2- e) 3- 2)Which of the following cations has the same number of unpaired electrons as Cr3+2 a) Ni2+ b) Fe2+ 2+ c) Zn 2+ d) Mn e) Co2+ 3)Which of the following characteristics apply to PBrz? 1. nonpolar molecule 2.polar bonds 3.trigonal-pyramidal molecular geometry 4.sp? hybridized a)1 and 2 b)2 and 3 c)3 and 4 4)1, 2, and 3 5)1, 2, 3, and 4 4)The electron-dot structure (Lewis structure) for which of the following mole- cules would have two unshared pairs of electrons on the central atom? a)H2S b) NIT: e) CH. d) HCN e) CO2 5) Which of the following molecule does not exist due to its zero bond order? a) H2 b) He-2 e) Hez d) HZ- e)Li2 6)In which species is the central atom NOT surrounded by exactly 8 valance atoms? a)NH, b) NCL. c) H20 d) SF e) CO2 7)According to the VSEPR model, the progressive decrease in the bond angles in the series of molecules CH, NH3; H20 is best explained by the.... a) Increasing strength of bonds b) decreasing size of the central atom c) increasing electronegativity of central atom d) increasing number of unshared pairs of electrons e) decreasing repulsion between hydrogen atom 8) Which of the molecule has the shortest bond length? aBr b)02 c)Ch d)N2 e)I: 9)Which of the following compounds contains the lead(IT) ion? a)Pb2s b)PbCL c)Pb20 d) ) 101 ecardi