hydrogen	h
carbon	c
nitrogen	n
oxygen	o
fluorine	f
phosphorus	p
sodium	na
potassium	k
chlorine	cl
magnesium	mg
aluminum	al
silicon	Si
sulfur	S
calcium	Ca
Iron	Fe
Copper	Cu
zinc	Zn
silver	Ag
Iodine	I
Mercury	Hg
lead	Pb
radium	Ra