14 
The Philippine Journal of Science 
1921 
Cl 
Na 
F Sc + - F H - 0 La 0 - H 
i i 
i i 
l I 
I I 
l I 
l l 
F~ 0 - H 
THE REMAINING ELECTROPOSITIVE GROUPS 
(II. Ill) IV 
IV (III) IV 
IV 
Ti 
Zr , Ce 
, Th . 
(II, III, IV) V 
(II. Ill, IV) V 
Ill (IV) 
V 
, Cb 
Pr 
UX 2 . 
(II, III) VI 
(III, IV) VI 
III (IV?) 
(Ill, IV, V) VI 
Cr 
Mo 
Nd 
U 
II (III, IV. VI) VII 
Mn 
(id in 
(id iii 
in 
Ill (IV?) Ill 
Sa , 
Eu , Gd 
, Tb 
, Ho , 
HI 
iii iii 
iii 
iii hi 
Dy , 
Er , Tm , 
Tm 2 , 
Yb , Lu . 
(II. IV) 
V 
Ta 
. 
(II. IV, V) VI 
W 
. 
(id in i 
(IV) II, III (IV, VI, VII, VIII) 
II, III, IV, VI, VIII 
Fe 
, Ru 
> 
Os 
ii an) 
(II) III (IV) 
II, III, IV 
Co 
, Rh 
Ir 
. 
ii an) 
II, (III, IV) 
II, IV (VI) 
Ni 
Pd 
Pt 
. 
i, ii 
i i. iii 
Cu , 
Ag , Au 
ii 
a?) ii i, ii 
Zn , Cd , Hg 
(id in 
(i. id iii 
i, iii 
Ga 
, In , Tl 
. 
Electrons in shell = 
4 to 27. 
EXAMPLES 
+ 
+ 
B --- Cl 
cr 
o 
II 
B 
II 
0 
H - 0 
B 
18 
0 
I 
H 
Na 
0 - H 
0 
II 
A1 
0 
