342 



Table 406. 

 MISCELLANEOUS CONSTANTS (ATOMIC, MOLECULAR, ETC.). 



Elementary electrical charge, charge on electron, 1/2 charge 

 on a particle, 



Mass of an electron, 



Radius of an electron, 



Number of molecules per gram molecule, 



Number of gas molecules per cc, 760"™, 0°C, 



Kinetic energy of a molecule at o°C, 



Constant of molecular energy, Eq/T, 



Constant of entropy equation (Boltzmann), = R/N (^ 



= poVo/TN = (2/3)6, 

 Elementary " Wirkungsquantum," 

 Mass of hydrogen atom, 

 Radius of an atom, 

 Gas constant, R = 22.4i2/273.i for i gram molecule of an 



ideal gas. Pressure in atmospheres, g = 980.6, vol. in liters, 



e =4.774X10"^° e. s. u. (M) 

 I = 1.519X10^^" e. m. u. 



= 1,591X10-^3 coulombs 

 m = about 6X1 o~'*^ grams. 

 1 =about iXio-i^ cm. 

 N =6.o6Xio'-23gr-i (M) 



n =2.7oXioi« (M) 

 £0=5.62X10-1* ergs. (M) 

 e ^2.06X1 0-16 ergs /degrees 



k = 1.37X10-1'^ " " 



h =6.62X10-2' erg. sec. 

 = 1. 64X10-2* gram. 

 ^ about 10—* cm. 



R =.08207 liter. Atm/grm. 



(M) 

 (M) 

 (M) 



(M) MiUikan, Phys. Rev. 2, p. 109, 1913. The other values are mostly means. 

 Smithsonian Tables. 



