practice_test_2[1] - 1.Which of the following has the...

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1.Which of the following has the highest lattice energy? NaCl KI MgO BaO CaO 2. Which of the following metal ions has the ground-state electron configuration [Ar]3d6? Ni3+ Fe2+ Mn2+ Cu+ Ca2+ 3. How many lone pairs of electrons are found in the Lewis structure of hydrazine, H2NNH2? 8 4 1 0 2 4. Which of the following species are radicals? CO2 HNO3 NO2
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NO3– HNO2 5. How many electrons are in the expanded valence in XeO 4 ? 6. What is the electron pair geometry of BrO 4 ? tetrahedral trigonal bipyramidal seesaw T-shaped square planar 7. What is the molecular geometry of CS 3 2– ? trigonal pyramidal trigonal planar T-shaped tetrahedral seesaw 8. Which of the following has bond angles slightly less than 120°? SO 3 SF 2 I 3 NO 3
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O 3 9. Draw the Lewis structure of formamide, NH 2 CHO, and give the number of lone pairs of electrons, and the number of σ - and π -bonds 10. For the Lewis structure of the cyanamide ion that contains two double bonds, N =C=NH
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