242 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., 76o mm , oC, 



Kinetic energy of a molecule at oC, 



Constant of molecular energy, Eo/T, 



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



r e =4.774Xio- 10 e. s. u. (M) 

 = i.5i9Xio- 20 e. m. u. 

 = i,59iXio- 19 coulombs 

 m = about 6Xio~ s8 grams. 

 1 = about iXio~ 13 cm. 

 N =6.o6Xio 23 gr- 1 (M) 

 n =2.7oXio 19 (M) 

 Eo=5.62Xio- 14 ergs. (M) 

 e = 2.o6X i o~ 16 ergs /degrees 



k = 



Elementary " Wirkungsquantum," h = 6.62Xio~ 27 erg. sec. 

 Mass of hydrogen atom, = i. 64X10-2* gram. 



Radius of an atom, = about 10 8 cm. 



Gas constant, R = 22.412/273.1 for i gram molecule of an 



ideal gas. Pressure in atmospheres, g = 980.6, vol. in liters, R = .08207 liter. Atm /grm. 



(M) 

 (M) 

 (M) 



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

 SMITHSONIAN TABLES. 



