REAGENTS AND SOLUTIONS 



647 



(e) A 5 per cent sodium cyanide solution. 



(/) A 10 per cent solution of sodium chloride in o.i normal hydro- 

 chloric acid. 



(g) A 10 per cent sodium sulphite solution, kept in small, tightly 

 stoppered bottles. 



INTERNATIONAL ATOMIC WEIGHTS, 1920 



Aluminium Al 



Antimony Sb 



Arsenic As 



Barium Ba 



Bismuth Bi 



Boron B 



Bromine Br 



Cadmium Cd 



Calcium Ca 



Carbon. C 



Chlorine Cl 



Chromium Cr 



Cobalt Co 



Copper Cu 



Fluorine F 



Glucinum Gl 



Gold 'Au 



Hydrogen H 



Iodine I 



Iridium Ir 



Iron Fe 



Lanthanum La 



Lead Pb 



Lithium Li 



Magnesium Mg 



= 16. 

 27.1 



120.2 

 74.96 



137-37 



208.0 

 10.9 

 79.92 



112.40 

 40.07 

 12.005 

 35.46 

 52.0 

 58.97 

 63.57 

 I9.O 

 9.1 



197.2 

 1.008 



126.92 



IQ3.I 

 55.84 



139.0 



2O7.2O 



6-94 

 24.32 



= 16. 



Manganese Mn 54 . 93 



Mercury Hg 200 . 6 



Molybdenum Mo 96 .o 



Nickel < Ni 58.68 



Nitrogen N 14 . 008 



Osmium Os 190.9 



Oxygen O 16 . oo 



Palladium Pd 106. 7 



Phosphorus P 31 . 04 



Platinum . . Pt 195 . 2 



Potassium K 39. 10 



Radium Ra 226.0 



Selenium Se 79 . 2 



Silicon Si 28.3 



Silver Ag 107 . 88 



Sodium Na 23 .00 



Strontium Sr 87 . 63 



Sulphur S 32.06 



Tantalum Ta 181 . 5 



Tellurium Te 127.5 



Tin Sn 118.7 



Titanium Ti 48. i 



Tungsten W 184.0 



Uranium U 238.2 



Zinc Zn 65.37 



