222
JO
Baker Non-Resident Lectureship Series. :McGraw-Hill Book Company, Inc.• New York City. 1929. BRISCOE, HA~n.lETT, ]OIlNSON. ALYEA, McREVNOLDS, HAZLEHURST, AND LUDER, "Acids and bases," JOURNAL OF CHEMICAL EDUCATION, Easton, Pa., 1941.
(2) HALL,
(3) (4) (5) (6) (7) (8)
(9) (10)
(11) (12) (13) (14)
"Valence and the structure of atoms and molecules," The Chemical Catalog Co., Inc .. New York City, 1923, p. 142. LEWIS. J. Frankli1L Imt., 226, 293 (1938). LUDER, Chem. Rev., 27, 547 (1940). LUOER, J. CItE". Eouc., 19,24 (1942). FRANKLIN, "The nitrogen system of compounds:' Reinhold Publishing Company, New York City. 1935. AUDRIETH AND SCHMIDT, Proc. Nal. A cad. Sci. U. S .. 20, 221 (1934). ROSE, POKg. Ann., 73, 582(18-18); 74,562([8-18). TREADWELL AND HALL, "Analytical chemistry," John Wiley and Sons, Ncw York City, 9th Edition, Vol. II, (1942). p. 416. AUDRIETH, ]UKKOLA, MEINTS, AND HOPKINS, J. Am. Chem. Soc., 53, 1805 (1931). HOPKINS AND AUDRmTH, Trans. Am. Electrochem. Soc., 66, 135 (1934). REED, HOPKINS, AND AUDRIETH, J. Am. Chem. Soc., 57,1159 (1935). ScHMIDT AND AUDRIETH, Trans. lll';nois Stale Acad. Sci., 28, 133 (1935). LEWIS,
RNAL OF CHE.\11CAL EDUCATION
(15) TAEBEL AND HOPKINS, Z. (mOT/!.. l£llgem. Chem., 235, 62 (1937). (l6) Sl\f1TIl, SABETTA, A:-I"D STEINBACH, indo En~. Chem., 23, 1124 (1931). (17) AUDRIETH, LONG, AND EDWARDS, J. Am. Chem. Soc., 58,428 (1936) (IS) AUDRIETH, Unpublishcd observations. (l9) :rvL"CHIN AND VANECEK, Illinoi~ State Geo!. Survey, Rept. rllvcstigatiol1s No. 68, 1940. (20) GURTLER, Z. anorg. Chem .. 40, 225, 337 (19G4). (20 ScmFFAxD SESTINI, Ann., 228, 72 (1885). (22) TATE, Quart. J. CM",. Soc., 12, 160 (1859). (23) ROLLEY AND ANDRfi:S, Bull. soc. chim., 49,1065 (1931). (24) ZrNTL A!\,'1> BERTRAl\{, Z. anorg. allgem. Chem., 245, 16 (1940). (25) LANGE, Ber., 62B, 786 (1929). (26) SEARS AND QUILL, J. Am. Clrem. Soc., 47, 922 (1925); 48,343 (1926). (27) TnO){PSON, D.R.P., 91, 2S8 (1893). See also ABEGG'S "Handbuch dcr anorganischcn chemic. Die clemente der achten gruppe. Vierter teil. Nickel und seine verbindungen." Verlag von S. Hirzel, Leipzig, 1939, p. 113. (28) SAVELSBERG, Z. Elektrochem., 46, 379 (1940), (29) For a list of complex fluorides sec GmeHn's "Handbuch der anorganischcn chemic," Verlag Chemic Leipzig-Berlin, System-NulUlUcr 5,1926, p. 59.
Do You Know Your Periodic Table?
HE following interesting "test" was sent to us reT cently by Professor Mark Neubof of the Utah State
10.
Agricultural College, Logan, Utah. will be given next month.
11. 12.
Correct answers
DIRECTIONS
The code letters A to Z (omitting J) have been assigned to the first twenty-five elements in the periodic table. These code letters do not represent the chemical symbols, nor have the letters been assigned in alphabetical order. Place the code letters in their correct positions in the table below and indicate their atomic numbers. flint: First find out in which group each family belongs; then arrange the elements within the group. EVIDENCE
1.
2.
3. 4. 5. 6. 7. 8, 9.
The following elements belong together in groups; Z R D; S I F P; X BE; L H T; Q K A; WOV; YMC; GUN, The valence limits of element U are plus four and minus four. A,N is the formula of an oxide. E is a noble gas. S is an alkali element. C has five valence electrons. L is an alkali earth element. 0 is a halogen. The sulfate of T is more soluble than that of H but less than that of L.
13. 14. 15. 16, 17,
18.
19. 20. 21. 22. 23,
24.
The degree of ionization of an oxygen acid of M is 92% and that of the similar acid of C is 27%. The atomic radius of Q is larger than that of A. The electrons of atom N are distributed over three orbits. W belongs to a sub group. The salt OS is less stable than Or. Atom X contains two neutrons. D has the smallest atomic weight in its group. V boils at a lower temperature than O. The density of P is 0.53 and that of S is 0.99. R forms a stronger base than Z. U is the least metallic element in its group. F is a gas. Atom B contains ten protons. Q is more closely related to A then to K. Y is more metallic than either M or C. CONCLUSIONS
Group; I II III IV V VI VII VIII Series 1 2 3 4 Element: ABCDEFGHIKLM Atomic No.: Element: NO P Q RST U VWX Y Z Atomic No.:
