10
H   12.00  1.0079
He  10.99  4.0026
C    7.90  12.011
N    7.39  14.007
O    8.26  15.999
Na   5.35  22.990
Mg   6.04  24.305
Si   5.99  28.086
S    6.96  32.066
Fe   5.44  55.845