Answer Happy

5. Making connections: a. What type of intermolecular force(s) exist(s) between molecules with low melting points? b. What type of intermolecular force(s) exist(s) between molecules with higher melting points? c. What type of intermolecular force(s) exist(s) between molecules with low boiling points? d. What type of intermolecular force(s) exist(s) between molecules with higher boiling points? 6. CHALLENGE - Inferring: Which type of intermolecular force is stronger: London dispersion or dipole-dipole? How do you know? 1 H 2.1 3 4.0 Increasing 1.0 11 Na 0.9 19 к 24 26 27 28 29 32 35 25 Mn Со Cu Fe 1.8 Ge Ga 1.6 0.8 4 Be 1.5 12 Mg 1.2 20 Ca 1.0 38 Sr 1.0 56 Ba 0.9 88 Ra 0.9 1.5 21 Sc 1.3 39 Y 1.2 57 La 1.1 89 Ac 1.1 37 Rb 0.8 Decreasing 5 6 7 8 9 B с N O F 20 2.5 3.0 3.5 13 14 15 16 17 AI Si P S CI 1.5 1.8 21 25 3.0 31 33 34 As Se Br 1.8 2.0 2.4 28 49 50 51 52 53 in Sn Sb Te 1 1.7 1.8 1.9 2.1 25 81 82 83 84 85 TI Pb Bi Po At 1.8 19 1.9 20 22 Electronegativities of the Elements 22 TI 1.5 40 Zr 1.4 72 HI 1.3 23 V 1.6 41 Nb 1.6 73 Ta 1.5 Cr 1.6 42 Mo 1.8 74 W 1.7 43 Tc 1.9 75 Re 1.9 44 Ru 22 76 Os 22 Ni 1.9 46 Pd 22 78 PI 22 1.9 45 Rh 22 77 Ir 2.2 30 Zn 1.6 48 Cd 1.7 80 Hg 1.9 1.9 47 Ag 1.9 79 Au 24 55 Cs 0.7 87 Fr 0.7 Difference in electronegativity Less than 0.2 Type of bonds Non-polar covalent 0.2-1.7 Polar covalent More than 1.7 Ionic