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Noble gases TRENDS
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Atomic Mass- mass of an atom
He 4.003amu Ne 20.18amu Ar 39.948amu Kr 83.798amu Xe amu Rn 222amu
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Atomic size- radius of an atom
He 31pm Ne 38pm Ar 71pm Kr 88pm Xe 108pm Rn 120pm
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reactivity- ability of an element to undergo chemical changes
Unreactive Ne Ar Kr Xe Rn
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Shielding effect- full core shells blocking the positive nuclear force from reaching the valence shell He Ne 2 Ar 10 Kr 28 Xe 46 Rn 78
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Ionization energy- energy required to remove an electron
He 2372 Ne 2081 Ar 1521 Kr 1351 Xe 1170 Rn 1037
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Electronegativity- tendency of an atom to attract electrons
He -- Ne Ar Kr Xe Rn
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