"Ionisation energies of the elements"
"1st I.E.kJ/mol","2nd I.E.kJ/mol","3rd I.E.kJ/mol"
"Hydrogen",1310,,
"Helium",2370,5200,
"Lithium",520,7300,11800
"Beryllium",900,1800,14800
"Boron",800,2400,3700
"Carbon",1090,2400,4600
"Nitrogen",1400,2900,4600
"Oxygen",1310,3400,5300
"Flourine",1680,3400,6000
"Neon",2080,4000,6100
"Sodium",500,4600,6900
"Magnesium",740,1500,7700
"Aluminium",580,1800,2700
"Silicon",790,1600,3200
"Phosphorus",1010,1900,2900
"Sulphur",1000,2300,3400
"Chlorine",1260,2300,3800
"Argon",1520,2700,3900
