CHEM 201 Study Guide - Final Guide: Chemical Polarity, Sodium Oxide, Ionic Bonding

Na reacts with element X to from an ionic compound with the formula Na_3X. Ca will react with x to form ___. A) Ca3X B) Ca X C) Ca_3 X_2 D) Ca_2 X_3 E) Ca X_2 Which two bonds are least similar in polarity? A) 1-Br and Si-CI B) B-F and CI-F C) Ai-CI and I_Br D) O-F and CI-F E) C-CI and Ge-CI Based on the octet rule, phosphorus most likely forms a ___ ion. A) p^5- B) p^3- C) P^+ D) P^5+ E) P^3+ The complete electron configuration of krypton, element 36, is ____. A) 1s^2 2s^2 2p^6 3p^6 4s^2 3s^10 4p^6 B) 1s^4 2s^4 2p^8 3s^8 4s^4 3s^4 C) 1s^42 s^4 2p^6 3s^4 3p^6 4s^4 3s^8 D) 1s^4 2s^4 2p^10 3s^4 3p^10 4s^4 E) 1s^2 2s^2 3p^10 3s^2 3p^10 4s^2 3d^8 a tin atom has 50 electrons. Electrons in the ___ subshell experience the lowest effective nuclear charge. A) 1s B) 5s C) 5p D) 3p E) 3d Which equation correctly represents the electron affinity of calcium? A) Ca^+ (g) + e^- rightarrow Ca (g) B) Ca(g) rightarrow Ca^-(g) + e^- C) Ca(g) + e^- rightarrow Ca^-(g) D) Ca^-(g) rightarrow Ca(g) + e^- E) Ca(g) rightarrow Ca^+(g) + e^- Of the atoms below, ____ is the most electronegative. A) N B) Si C) C D) As The angular momentum quantum number for the outermost electrons in a boron ground state ___. A) -1 B) 1 C) 3 D) 2

Sort the following electron configurations of neutral atoms based on whether they represent an excited state configuration or a ground state configuration. X Excited state Ground state Incorrect You have not identified all of the excited state electron configurations. [He]2s 2p s22s22p63s?3p63d104s24p64d' An atom is in its ground state when all of the electrons occupy the lowest energy orbitals possible. When an electron is promoted to a higher energy orbital, the atom is said to be in an excited state. The orbitals in order of increasing energy are [Ne 3s23p2 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 6p 6s Note that the 5s sublevel is lower in energy than the 4d sublevel, therefore in the ground state you would expect the 5s to be filled before the 4d sublevel. There are some exceptions to this filling order based on the stability associated with a half-filled or completely filled d sublevel. ich neutral atoms have the following excited or ground state electron configurations? Enter the name of ne element. [Ar4s13de

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+