Question

12) Which of these ionic solids would have the highest melting point? A) NaCl D) Csi B) NaF E) CaCl2 C) CaBr2 13) The electronegativity difference between Element A and Element B is calculated to be 0.25. The bond they form would best be described as A) nonpolar covalent D) polyatomic B) polar covalent E) none of these C) ionic 14) Given the electronegativities below, which covalent single bond is most polar? Element: H C N O Electronegativity: 2.1 2.5 3.0 3.5 A C-H B) N-H c) O–H D) 0-C E) O-N 15) The Lewis structure of carbon monoxide (CO) is shown. How many total electrons are shared in the covalent bond of carbon monoxide? A) 2 B) 3 D) 6 E) none of these : C) 4

Answer 1

solution: -2) B) Naf will have highest melting point as it in mont ionic. I 1. According to Fasanh rule conditions for - lonic characteristics : 1) low charge 2) Large cation 3) Small anion

78) % ionic character [16 SET + 3.5[am)9. - [16x0.25 + 35% 0.252]7 i 4.22471 - The bond is B polar covalent 14) The most polar bond is c) O-H it has highest electronegativity difference 13) Lewis structure of co: ictoi Do electrom are shared