Carbon Group. 
HoH 1 
4dao's 
+++4++4+ 
bet dd bt 
ooo 
CAS 
| 
eo 
+4+4++ 
‘See's 
| 
oT an I wea I aoe 
Hao 
Cs oe: | 
++4++ 
ot 
1D 19 19 1D 
Henn a 
(=) Sy ets 
anor 
OND 
Hue id 
Si 
Zr 
Lithium Group. 
H 
+ H Methyle. 
H + H Ethyle. 
Oxygen and Magnesian Groups. 
.Ca 
. M 
ae 
Se 
3 
Oo w 
| fee 
OH 
+ + 
oO oO 
lag | 
3 HH 
On 
| 
+ oH 
+ + 
o 
TM RM 
oO 
wo 
| | 
ox 
N —t 
| ll 
3 
Ow 
o wo 
Pe eet | 
ie 6) [e.@) 
i zon 
M RB 
