hydrogen
2.2
lithium
0.98
beryllium
1.57
boron
2.04
carbon
2.55
nitrogen
3.04
oxygen
3.44
flourine
3.98
sodium
0.93
magnesium
1.31
aluminum
1.61
silicon
1.9
phosphorus
2.19
sulfur
2.58
chlorine
3.16
potassium
0.82
calcium
1
scandium
1.36
titanium
1.54
vanadium
1.63
chromium
1.66
manganese
1.55
iron
1.83
cobalt
1.88