CHM 11500 Study Guide - Midterm Guide: Sodium Chloride, Alpha Helix, Amorphous Solid

All of the following orbital representations are allowed except 7s 3d 1p 4f 3p Which of the following sets of the four quantum numbers n, l, m and s describe one of the outermost electrons in a ground-state radium atom? 6, 1, 1, 1/2 7, 0, 1, -1/2 7, 0, 0, -1/2 7, 1/2 7, 2, 1, -1/2 Electron configurations The electron configuration for Cr^2+ is [Ar] 4S^2 3d^4 [Ar] 4s^1 3d^5 [Ar] 3d^4 [Ar] 4s^2 3d^2 none of these Which pair of species is iselectronic? K^+ and Ar Na^+ and K^+ F' and Cl^- B^3+ and Ne Be^2+ and Na^+ Which of the following have a total of 10 electrons in the d orbital's? Mn Fe Cu Zn tow of the above What doubly positive ion has the ground-state electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10? Ni^2+ Zn^2+ Cd^2+ Ca^2+ Sr^2+

2. Circle the most appropriate answer (- 1 points if not doe 3. Write the letter on the blank in the left margin of the question number (-1 points if not done) 1. What is the noble gas core for CI? e. Kr d. Ar a. Xe b. Ne c. Rn Nb atom? 一一, which of the following electron configurations correctly represents the a. [Kr] 3d d. [Ar] 5s 4d e. [Ar] 4s 3d b. [Kr] 5s'4d _3. What element is represented by the electron configuration [Ar] 4s3d"4p? a. T b. 2r c. Sn d. Ga e. In 4. Alkali Metals exhibit the lowest first ionization energy. Which family of elements do you expect to exhibit the highest first ionization energy (IE:)? a. Halogens b. Pnictogens c. Chalcogens d. Noble Gases e. Alkaline Earth 5, which of the following best describes why 내 does not change significantly from top to bottom within a group? a. The number of protons in the nucleus does not change significantly c. There are more valence shells b. There are more completed electron shells d. There are fewer completed electron shells -. Give the family of elements in the periodic table that contains the least metallic elements. a. Halogens b. Pnictogens c·Cha!cogens d. Noble Gases e. Alkaline Earth _ . Determine the number of moles of C in 8221 g of carbon. a. 2.082 mol b. 2.623 mol c. 0.6851 mol d. 1.370 mol e.1.055 x 10 mol 8. Determine the mass in grams of 1.312 mol of Sc. b. 5.250 g a. 27.55 g c. 7.871g d. 0.3380 g e. 58.99 g 9. Write the electron configuration of a tin (Sn) atom (Z- 50). b. e. 1s 2s 2p 3s 3p

Identify the atom whose electron configuration is [Ne]3s^2 3p^3 and determine how many unpaired electrons are in the ground state of this atom. a) P, 1 unpaired electron b) P, 3 unpaired electrons c) Cl, 1 unpaired electron d) Cl, 3 unpaired electrons e) Mg, no unpaired electrons Which of the following configurations represents an excited state? 1. [Ne]3s^1 3p^1 2. [Ar]3d^10 4s^1 4p^2 3. [Kr]4d^10 5s^2 5p^1 4. [Ne]3s^1 3p^6 4s^1 a) 1 + 2 + 3 + 4 b) 1 + 2 + 4 c) 1 + 2 d) 2 + 3 e) 3 + 4 Which of the following statements is incorrect? a) I has a larger atomic radius than Br b) P^3- has a smaller ionic radius than S^-2. c) Ca^2+ has a smaller ionic radius than K^+. d) He has the largest first ionization energy. e) All of the above statements are correct. Draw a proper Lewis structure for AlFCl_2. Al is the central atom bonded to F and 2 Cl atoms. In the most stable Lewis structure: a) Al has a double bond to F b) There are eight electrons around Al. c) Al has a double bond to one of the Cl atoms. d) Al is electron deficient with 6 electrons around it. e) Al has a double bond to both Cl atoms.