REED RELATION BETWEEN VALENCE & ATOMIC WEIGHT. 655 



LITHIUM. 



Atomic weight 7.007 ± .007. 

 L/ is -f- I in all compounds. 



BERYLLIUM. 



Atomic weight 9.085 zt -0055. 

 Be is -[- 2 in all compounds. 



BORON. 



Atomic weight 10. 141 i -023. 

 B is -|~ 3 iri all compounds. 



CARBON. 



Atomic weight 11.9736 zh .0028. 



C is — 4 in 



H^C and maybe — 4 in some other 



h_ydro-carbons. 

 C is — Qi+^/n) in the series Hzn+zCn, 



varying from — 4 to — 2 in 

 H,C, _(2 + f) = -4 

 HeC,, _(2 + f)=r-3 



H,C3, -(2 + f) = -2.67 



HsC, 



1+^ 



^] = -... 



(H2„-2C„ 



(1 + = 



In all the series represented by the general expression HawiaCw, 

 we find for « = 00 , C is _ 2. If we suppose « to vary between 

 the limits -|- i and -f- x , a having any even integral value be- 

 tween -|- 2 and — 6 (its practical limits), the valence of C lies 

 between o and —4. 



If we next suppose C/ derivatives to be formed by substituting 

 C/-1 for H + i in all these series, the valence of C then varies be- 

 tween o and —4. 



C is 4- 2 in 

 +1+2-3 



HCN and all cyanides, 

 CO, carbon monoxide. 



C is -|- 3 in 

 +3—3 

 CN, cyanogen. 



C is + 4 in 



CO, and all carbonates, 

 CS2 and all thio-carbonates, 

 COC/.,, carbonyl chloride, 

 COBr,, " bromide(?), 

 CSC/2> thio-carbonyl chloride, 

 H4CN2O, urea, and isomerides, 

 H4CN2S, sulpho-urea. 



NITROGEN. 



Atomic weight 14.021 ± -0035. 

 N is — 3 in 

 HoN and all ammonic salts. 



BN, boron 



K3N, potassic 



CwjN, cuprous 



C^-N, chromic 



Z«3N2, zincic 



H^sNo, mercuric 



VN, vanadium 



T3X4, titanic 



TaN, tantalous 



Ta3N5, tantahc 



HPNo, phosphoric-hydric 



W3N.,, tungstous 



nitride, 



