"Ionisation energies of the elements in kJ/mol"
"1st I.E.kJ/mol","2nd I.E.kJ/mol","3rd I.E.kJ/mol"
"H",1310,,
"He",2370,5200,
"Li",520,7300,11800
"Be",900,1800,14800
"B",800,2400,3700
"C",1090,2400,4600
"N",1400,2900,4600
"O",1310,3400,5300
"F",1680,3400,6000
"Ne",2080,4000,6100
"Na",500,4600,6900
"Mg",740,1500,7700
"Al",580,1800,2700
"Si",790,1600,3200
"P",1010,1900,2900
"S",1000,2300,3400
"Cl",1260,2300,3800
"Ar",1520,2700,3900
"K",420,3100,4400
"Ca",590,1100,4900
"Sc",630,1200,2400
"Ti",660,1300,2700
"V",650,1400,2800
"Cr",650,1600,3000
"Mn",720,1500,3300
"Fe",760,1600,3000
"Co",760,1600,3200
"Ni",740,1800,3400
"Cu",750,2000,3600
"Zn",910,1700,3800
