[
 {
  "value": "54.417760",
  "sigma": "0.000001",
  "source": "NIST Handbook of Basic Atomic Spectroscopic Data, He II ground state 438908.8789 cm^-1",
  "year": "2005",
  "field": "chemistry",
  "id": "K1",
  "unit": "eV",
  "quantity": "He+ ionization energy",
  "grade": "primary table, PRIOR-ART row 17",
  "bound_low": "",
  "bound_high": "",
  "recalled": "no"
 },
 {
  "value": "122.45429",
  "sigma": "0.00001",
  "source": "NIST data as compiled (Li III)",
  "year": "2005",
  "field": "chemistry",
  "id": "K2",
  "unit": "eV",
  "quantity": "Li2+ ionization energy",
  "grade": "secondary compilation citing NIST, PRIOR-ART row 17",
  "bound_low": "",
  "bound_high": "",
  "recalled": "no"
 },
 {
  "value": "2",
  "sigma": "0",
  "source": "periodic table",
  "year": "1869",
  "field": "chemistry",
  "id": "K3",
  "unit": "1",
  "quantity": "atomic number of the 1st noble gas",
  "grade": "exact",
  "bound_low": "",
  "bound_high": "",
  "recalled": "no"
 },
 {
  "value": "10",
  "sigma": "0",
  "source": "periodic table",
  "year": "1898",
  "field": "chemistry",
  "id": "K4",
  "unit": "1",
  "quantity": "atomic number of the 2nd noble gas",
  "grade": "exact",
  "bound_low": "",
  "bound_high": "",
  "recalled": "no"
 },
 {
  "value": "18",
  "sigma": "0",
  "source": "periodic table",
  "year": "1894",
  "field": "chemistry",
  "id": "K5",
  "unit": "1",
  "quantity": "atomic number of the 3rd noble gas",
  "grade": "exact",
  "bound_low": "",
  "bound_high": "",
  "recalled": "no"
 },
 {
  "value": "36",
  "sigma": "0",
  "source": "periodic table",
  "year": "1898",
  "field": "chemistry",
  "id": "K6",
  "unit": "1",
  "quantity": "atomic number of the 4th noble gas",
  "grade": "exact",
  "bound_low": "",
  "bound_high": "",
  "recalled": "no"
 },
 {
  "value": "24.587389",
  "sigma": "0.000001",
  "source": "NIST ASD, He I first ionization energy",
  "year": "2020",
  "field": "chemistry",
  "id": "Q04",
  "unit": "eV",
  "quantity": "He first ionization energy",
  "grade": "recalled standard value, PRIOR-ART row 20",
  "bound_low": "",
  "bound_high": "",
  "recalled": "yes"
 },
 {
  "value": "21.564540",
  "sigma": "0.000001",
  "source": "NIST ASD, Ne I",
  "year": "2020",
  "field": "chemistry",
  "id": "Q05",
  "unit": "eV",
  "quantity": "Ne first ionization energy",
  "grade": "recalled standard value, PRIOR-ART row 20",
  "bound_low": "",
  "bound_high": "",
  "recalled": "yes"
 },
 {
  "value": "15.759610",
  "sigma": "0.000001",
  "source": "NIST ASD, Ar I",
  "year": "2020",
  "field": "chemistry",
  "id": "Q06",
  "unit": "eV",
  "quantity": "Ar first ionization energy",
  "grade": "recalled standard value, PRIOR-ART row 20",
  "bound_low": "",
  "bound_high": "",
  "recalled": "yes"
 },
 {
  "value": "5.139077",
  "sigma": "0.000001",
  "source": "NIST ASD, Na I",
  "year": "2020",
  "field": "chemistry",
  "id": "Q07",
  "unit": "eV",
  "quantity": "Na first ionization energy",
  "grade": "recalled standard value, PRIOR-ART row 20",
  "bound_low": "",
  "bound_high": "",
  "recalled": "yes"
 },
 {
  "value": "4.340664",
  "sigma": "0.000001",
  "source": "NIST ASD, K I",
  "year": "2020",
  "field": "chemistry",
  "id": "Q08",
  "unit": "eV",
  "quantity": "K first ionization energy",
  "grade": "recalled standard value, PRIOR-ART row 20",
  "bound_low": "",
  "bound_high": "",
  "recalled": "yes"
 }
]