Part 1 of 3 N, AS, P O

Use the following data and the Born-Haber cycle to calculate the first ionization energy (ΔH IE1) of K(g) K(s) → K(g) 89 kJ mol-1 Cl(g) + e– → Cl–(g) -349 kJ mol-1 K(s) + ½ Cl2(g) → KCl(s) -437 kJ mol-1 K(g) → K+(g) + e– ΔH IE1 Cl2(g) → 2Cl(g) 244 kJ mol-1 K+(g) + Cl–(g) → KCl(s) -717 kJ mol-1

Which of the following elements would you expect to have positive electron affinity? Ne Br Cl F O

What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.90×1015Hz? Express your answer in joules to three significant figures. It is not 9.17×10−19 J or 12.589 x 10-19 J By using the following formula, you can calculate the kinetic energy of the emitted electron: KE=E−ϕ=hν−hν0 where h=6.63×10−34 J⋅s is Planck's constant, ν=1.90×1015Hz is the given frequency, and ν0=9.39×1014 Hz is your answer from Part A. The threshold frequency ν0 of cesium is 9.39×1014 Hz

The simpliest oxide for Fe2+ is FeO. How does one come to that conclusion?   The simpliest oxide of Cs2+ is Cs2O. How does one come to that conclusion?     The simplest oxide of Ba2+ is BaO. How does one come to that conclusion?

Based on the ionization energies of the alkali metals, which alkali metal would you expect to undergo the most exothermic reaction with chlorine gas? Express your answer as a chemical symbol. О Ва О Ве O Cs оооо

An element has the following electron configuration, [Ar]3d104s²4p3. This element is a _-- O transition metal O metal noble gas nonmetal O metalloid

In the Periodic Table below, shade the d-block elements. H Li Be Na Mg K Ca Sc Rb Sr Y Cs Ba La Fr Ra Ac BCN 0 He F Ne Al Si P S Cl Ar Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Rf Db Sg Bh Hs Mt Ds Rg Cn Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

18 19 20 21 22 23 Write the electron configuration for a carbon anion with a charge of -1. 11 3 ? Continue 7. X 24 25 26

In what ways do Argon, Neon, and Krypton react the same as each other and in what ways do they react differently? Explain.