Consider the following data for niobium: g 92.906 mol atomic mass electronegativity 1.60 kJ 86.1 mol electron affinity kJ 652.1 mol ionization energy kJ 26.8 mol heat of fusion You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release absorb (1) Nb (g) Nb (g) + e Can't be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? yes no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): O kJ/mol Does the following reaction absorb or release energy? release absorb (2) Nb(g) Nb g) + e Can't be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? yes no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): O kJ/mol

Identify the most polar bond in each molecule. (To answer this question you may consult the table of electronegativity values in the table below.) 1A 2A Li Be 1.0 1.5 Na Mg 0.9 1.2 3B 4B 5B 6B 7B 2: CHBRCIF K Ca Sc Ti V Cr Mn Fe 0.8 1.0 1.3 1.5 1.6 1.6 1.5 1.8 Rb Sr Y 0.8 1.0 1.2 1: (CH3)3CCI Zr Nb Mo 1.4 1.6 1.8 <1.0 1.0-1.4 H 2.1 1.5-1.9 2.0-2.4 8B Co 1.8 1B 2B Ni Cu Zn 1.8 1.9 1.6 3A B 2.0 2.5-2.9 3.0-4.0 Al 1.5 Ga 1.6 Te Ru Rh Pd Ag Cd In 1.9 2.2 2.2 2.2 1.9 1.7 1.7 4A 5A 6A 7A с 0 2.5 3.0 3.5 F 4.0 Si 1.8 2.1 P S 2.5 Ge As Se 1.8 2.0 2.4 Sn 1.8 Sb Te 1.9 2.1 At Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.2 2.2 2.2 2.4 1.9 1.8 1.8 1.9 2.0 2.2 CI 3.0 Br 2.8 I 2.5 Write the symbols for the two atoms involved in the bond, separated by a hyphen, i.e. O-H (note that the answer is case-sensitive).

The formation of KCl(s) from K(s) and Cl2(g) is an exothermic process (DHf for KCl(s) is negative). Considering the steps involved in the Born-Habor cycle, which of the following steps contributes to the stability of KCl(s)? Dissociation of Cl2(g) Electron gain by Cl(g) Ionization of K(g) Sublimation of K(s)

Consider the following data for sulfur: atomic mass 32.066 g/mol electronegativity 2.58 electron affinity 200.4 kJ/mol ionization energy 999.6 kJ/mol heat of fusion 1.73 kJ/mol Does the following reaction absorb or release energy? (1) S+(g)+ e- -> S(g) Is it possible to calculate the amount of energy absorbedor released by reaction (1) using only the data above? If you answered yes to the previous question, enter theamount of energy absorbed or released by reaction (1): Does the following reaction absorb or release energy? (2) S(g) + e- -> S-(g) Is it possible to calculate the amount of energy absorbedor released by reaction (2) using only the data above? If you answered yes to the previous question, enter theamount of energy absorbed or released by reaction (2):

Complete the blanks in each column, as in the first example: Name of the Magnesium Lithium ion Sulfide ion particle atom charge 3+ condensed e [He]3s? [He]2s?2p? [Kr]5s?4d10 configuration atomic Lewis • Mg. :Cl: structure

The enthalpy for the reaction below is 242.6 KJ/mole.  What is the maximum wavelength of a photon needed to break the Cl2 bond?   Cl2  ------>2 Cl

The Pauling electronegativity of Cl is 3.2 while that of Br is 3.0. Estimate the bond dissociation energy of D(Cl-Br) .bond in kJ/mol given: D(Br-Br)=224 kJ/mol, D(Cl-) .(CI)=160 kJ/mol.) (1.0 eV = 96.5 kJ/mol 196 228 204 219 237

Consider the following data for vanadium:

A sodium vapor street lamp emits yellow light at wavelength λ = 589 nm. How much energy is released per mole of sodium atoms? O2.0 × 105 J O 5.4 × 108 J O 7.2 × 10-13 J O 1.9 × 10-4 J O 3.5 × 10-1⁹ J

Consider the following data for potassium: atomic mass electronegativity electron affinity ionization energy heat of fusion 39.098 48.4 0.82 418.8 (2) K (g) + e 2.33 g mol kJ mol kJ mol You may find additional useful data in the ALEKS Data tab. → K (g) kJ mol Does the following reaction absorb or release energy? (1) K (g) → K (g) + e Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): Does the following reaction absorb or release energy? Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): O release O absorb O Can't be decided with the data given. O yes Ono kJ/mol O release O absorb O Can't be decided with the data given. O yes O no kJ/mol X S