1
h or hydrogen
2
he or helium
3
li or lithium
4
be or beryllium
5
b or boron
6
c or carbon
7
n or nitrogen
8
o or oxygen
9
f or flourine
10
ne or neon
11
na or sodium
12
mg or magnesium
13
al or aluminum
14
si or silicon
15
p or phosphorus
16
s or sulfur
17
cl or chlorine
18
ar or argon
19
k or potassium
20
ca or calcium
21
sc or scandium
22
ti or titanium
23
v or vanadium
24
cr or chromium