THE PROPERTIES OF METALLIC SUBSTANCES 



387 



TABLE CLIII. 



ATOMIC CONDUCTANCE, SPECIFIC RESISTANCE AND RESISTANCE TEMPERA- 

 TURE COEFFICIENT OF ELEMENTARY METALS AT 0. 



Metal 



A X 10- 6 



Silver 6.999 



Potassium 6.503 



Sodium :.. 5.288 



Rubidium 4.845 



Copper 4.559 



Gold 4.547 



Caesium 3.898 



Aluminium 3.834 



Magnesium 3.215 



Chromium 2.989 



Calcium 2.457 



Indium 1.905 



Cadmium 1.875 



Rhodium 1.811 



Zinc 1.713 



Lithium 1.534 



Iridium 1.414 



Tantalum 1.339 



Tin 1.252 



Osmium 1.119 



Thallium 0.9775 



Nickel 0.9613 



Lead 0.9222 



Palladium 0.9082 



Platinum 0.8314 



Iron 0.8031 



Strontium 0.7194 



Cobalt 0.7064 



Manganese 0.6561 



Antimony 0.4658 



Arsenic 0.3735 



Gallium 0.2208 



Bismuth 0.1972 



Mercury 0.1564 



CT O X 10 6 



1.468 

 6.100 

 4.28 

 11.60 

 1.561 

 ' 2.197 

 18.12 

 2.563 

 4.355 

 4.40 

 10.50 

 8.370 

 10.023 

 4.700 

 5.751 

 8.550 

 8.370 

 14.60 

 13.048 

 9.500 

 17.633 

 12.323 

 20.380 

 10.219 

 11.193 

 9.065 

 24.75 

 9.720 

 4.400 

 39.00 

 35.10 

 53.40 

 108.00 

 95.80 



Oo- 100 Xl0 3 



4.10 



5.5 



5.1 



4.33 

 3.98 



4.26 

 3.90 



4.74 



4.24 



4.43 



4.17 



4.57 



3.71 



3.47 



4.47 



4.2 



5.17 



4.87 



4.22 



3.77 



3.92 



6.57 



3.66 



4.73 

 3.89 



4.46 

 0.88 



As may be seen from the table, the specific resistance of silver is 

 1.47 X 10' 6 . Compared with this, the specific resistance of fused salts 

 is of the order of 1.0 and that of electrolytes, at normal concentration, 10. 

 In comparing the conducting power of metals it is more rational to 

 employ the atomic, or perhaps even the equivalent, rather than the spe- 

 cific conductance, On this basis, metallic conductors exhibit many rela.- 



