periodic+table

alkaline earth metals-beryllium, magnesium, calcium, strontium, barium, and radium

Halogen-fluorine, chlorine, bromine, iodine, and astatine,

Alkaline earth metals fluorides solubility-related constants [|[n 2]] ||~ Metal HE [|[11]] [// [|clarification needed] //] ||~ F − HE [|[12]] [// [|clarification needed] //] ||~ "MF 2 " unit HE ||~ MF 2 lattice energies [|[13]] ||~ Solubility [|[14]] [// [|clarification needed] //] ||
 * ~ M 2+
 * Be || 2,455 || 458 || 3,371 || 3,526 || soluble ||
 * Mg || 1,922 || 458 || 2,838 || 2,978 || 0.0012 ||
 * Ca || 1,577 || 458 || 2,493 || 2,651 || 0.0002 ||
 * Sr || 1,415 || 458 || 2,331 || 2,513 || 0.0008 ||
 * Ba || 1,361 || 458 || 2,277 || 2,373 || 0.006 ||

( [|u] ) [|[n 1]][|[21]]  ||~ [|Melting point] ( [|K] ) ||~ [|Melting point] ( [|°C] ) ||~ [|Boiling point] ( [|K] ) [|[22]] ||~ [|Boiling point] ( [|°C] ) [|[22]] ||~ [|Density] (g/cm 3 at 25 °C) ||~ [|Electronegativity] ( [|Pauling] ) ||~ First [|ionization energy] ( [|kJ·mol−1] ) ||~ [|Covalent radius] ( [|pm] ) [|[23]] ||
 * ~ Halogen ||~ Standard [|atomic weight]
 * [|Fluorine] || 18.9984032(5) || 53.53 || −219.62 || 85.03 || −188.12 || 0.0017 || 3.98 || 1681.0 || 71 ||
 * [|Chlorine] || [35.446; 35.457] [|[n 2]] || 171.6 || −101.5 || 239.11 || −34.04 || 0.0032 || 3.16 || 1251.2 || 99 ||
 * [|Bromine] || 79.904(1) || 265.8 || −7.3 || 332.0 || 58.8 || 3.1028 || 2.96 || 1139.9 || 114 ||
 * [|Iodine] || 126.90447(3) || 386.85 || 113.7 || 457.4 || 184.3 || 4.933 || 2.66 || 1008.4 || 133 ||
 * [|Astatine] || [210] [|[n 3]] || 575 || 302 || ? 610 || ? 337 || ? 6.2–6.5 [|[24]] || 2.2 || ? 887.7 || ? ||