Practice sheet #4: The Periodic Table of Elements, Ions and ..., Study notes of Chemistry

Download Practice sheet #4: The Periodic Table of Elements, Ions and ... and more Study notes Chemistry in PDF only on Docsity! CH 101/103 - Practice sheet – 2/24/2014 Practice sheet #4: The Periodic Table of Elements, Ions and the Ionic Bond. 1. Periodic table and periodic properties of elements a. Rank the following species according to their properties. (1 = highest, 4 lowest) Se2- H Se C Radius Ionization Energy Electron Affinity Electronegativity 2. Assign to every atom of the following ionic compounds its formal charge. Ca2C AmI4 Mn3P7 3. Write two possible compounds for the following pairs of elements. Sn; O ____________ ___________ W; F ___________ ___________ 4. Calculate the lattice energy of the following crystals: i. 2.5g of Cesium Chloride (CsCl) ______________________ ii. 14.6g of rutile (TiO2) ______________________ 5. Fill the table below in, with the missing electron configurations and give an explanation for the trends in the first Ionization Energy; possible trends are : a. Z increases b. Electron –electron repulsion c. New shell d. l increases or Zeff decreases (shielding) Atom Z Electron configuration IE1 mol kJ Trends in IE1 Explanation Ions IE2 mol kJ He 2 1s2 2373 He+ 1s1 5248 Li 3 1s22s1 520 Li+ 1s2 7300 Be 4 1s22s2 899 Be+ 1s22s1 1757 B 5 122 221 xpss 801 B+ 2430 C 6 1122 2221 yx ppss 1086 C+ 122 221 xpss 2350 N 7 1400 N+ 1122 2221 yx ppss 2860 O 8 1314 O+ 11122 22221 zyx pppss 3390 F 9 12222 22221 zyx pppss 1680 F+ 3370 Ne 10 2080 Ne+ 12222 22221 zyx pppss 3950 Na 11 496 Na+ 22222 22221 zyx pppss 4560 Mg 12 738 Mg+ 13][ sNe 1450 Al 13 12 33][ xpsNe 578 Al+ 1820