REED— RELATION BETWEEN VALENCE & ATOMIC WEIGHT. 655 



P is + 5 in 

 H3PO4 and all phosphates. 



SULPHUR. 



Atomic weight 31 .984 ± .012. 



S is — 2 in 

 H2S and all sulphides, 

 HCj'S and all thio-cjanates. 



S may be — i in 

 HoS,, hydric disulphide. 



Sis + i in 

 S.Clo, sulphur monochloride, 

 SaBrj, " monobromide, 

 S2I2, " moniodide. 



S is 4-2 in 

 SC/2' sulphui- dichloride, 

 H.S.Os and all thio-sulphates. 



S is -[-4 in 

 H.SO;, and all sulphites. 



S is+6in 

 H2SO4 and all sulphates, 

 Sle, sulphur-hexiodide. 



CHLORINE. 



Atomic weight 35.370 ± .014- 



C/is — I in 

 HC/ and all chlorides. 



C/is + i in 

 HC/0 and all hypochlorites. 



C/ is +3 in 

 HC/O2 and all chlorites. 



C/ is +4 in 

 CI ,0^, chlorine peroxide. 



C/ is -|-5 in 

 HC/O3 and all chlorates. 



C/is +7 in 

 KC/O4 and all perchlorates. 



POTASSIUM. 



Atomic weight 39.019 ± -012. 

 K is + I in 

 K2H, potassic hydride, 

 KvO and all potassic salts. 



K is +3 in 

 KI3, potassic tri-iodide, 

 K2S3, " tri-sulphide. 



K is -|-4 in 

 KO2, potassic dioxide, 

 KS2, " disulphide. 

 K may be + 5 in 

 K2S5, potassic pentasulphide. 



CALCIUM. 



Atomic weight 39.99 zt -Oi. 

 C« is -f- -2 in 

 CaO and all calcic salts. 

 C« is 4-4 in 

 CrtC2, calcic dioxide. 



SCANDIUM. 



Atomic weight 43.98 i: -oiS- 

 Sc is +3 in 

 SC2O3 and corresponding salt«. 



Noie. — In order to conform to the 

 law explained farther on, Sc ought 

 to form a dioxide or some other 

 quadrivalent compound. It ought 

 really to form a series of salts cor- 

 responding to the eerie salts. It 

 would then not only conform to the 

 1 law, but fill a vacancy in the second 

 series of "harmonics." 



TITANIUM. 



Atomic weight 48.001. 

 The recent experiments of Thorpe 

 give the atomic weight of Ti 48.001 . 

 His results are the most concordant 

 of any yet obtained, and are proba- 

 bly the most reliable.* They con- 

 firm the determination of Rose. 



T? is -f 2 in 

 T/C/2, titanium dichloride. 



Tt is -j- 3 in 

 T/0,3, titanium sesquioxide, 

 T/aCSO^jg, " sesquisulphate, 

 Tt^Clg, " sesquichloride, 



TioOoCl^, " oxychloride. 



See Chem. Nt'ivs, vol. 4S, p. 251, and vol. 51, p. 46. 



