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
