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Electron Configuration Flashcards: All 118 Elements

Practice neutral-atom ground-state electron configurations for every named element, with NIST-based shorthand and clearly labeled predictions.

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Om denne kortstokken

These 131 English flashcards practice neutral-atom ground-state electron configurations for all 118 currently named elements, from hydrogen through oganesson. Every element-to-configuration card includes the name, symbol, and atomic number. Thirteen extra reverse cards ask for the element behind a selected high-value irregular configuration.

What’s included

  • 118 element-to-configuration cards in noble-gas shorthand.
  • 13 configuration-to-element cards for Cr, Cu, Nb, Mo, Ru, Rh, Pd, Ag, Ce, Gd, Pt, Au, and Cm.
  • A sequence by increasing atomic number, with each reverse card placed at least six unrelated cards after its matching forward card.
  • The requested answer first on every back, with source qualifiers appended for lawrencium and the predicted elements 109–118.
  • NIST ASD ground-shell assignments through hassium. Meitnerium through oganesson are labeled as PubChem/LANL predictions; lawrencium follows NIST’s current 7p¹ assignment.

What’s excluded

The deck does not include full expanded configurations, ions, excited states, orbital-box diagrams, quantum numbers, derivation drills, oxidation states, or other element properties. It also avoids automatic reverse cards and separate name, symbol, and atomic-number permutations for every element.

Sources and reuse

The primary factual sources are the NIST Atomic Spectra Database, its ground-shell guidance, and the NIST periodic table. PubChem’s element pages expose property-level sources and provide the stated LANL prediction convention for elements 109–118. For roentgenium, this deck follows the exact PubChem element entry and LANL page, which both predict [Rn] 5f¹⁴ 6d⁹ 7s²; PubChem’s downloadable table instead lists [Rn] 5f¹⁴ 6d¹⁰ 7s¹. This documented source disagreement is not treated as a second accepted answer. IUPAC confirms the current names and symbols.

The questions, answers, selection, order, and cover were produced independently. No competitor cards, prose, tables, logos, or trade dress were copied. The CC0 label covers only the original wording, organization, metadata, and generated media that Open Study Contributor can license; it does not claim ownership of scientific facts or source material.

Kort i denne kortstokken

  1. Kort 1

    Spørsmål

    Hydrogen (H, Z=1) — neutral ground-state configuration

    Svar

    1s¹

  2. Kort 2

    Spørsmål

    Helium (He, Z=2) — neutral ground-state configuration

    Svar

    1s²

  3. Kort 3

    Spørsmål

    Lithium (Li, Z=3) — neutral ground-state configuration

    Svar

    [He] 2s¹

  4. Kort 4

    Spørsmål

    Beryllium (Be, Z=4) — neutral ground-state configuration

    Svar

    [He] 2s²

  5. Kort 5

    Spørsmål

    Boron (B, Z=5) — neutral ground-state configuration

    Svar

    [He] 2s² 2p¹

  6. Kort 6

    Spørsmål

    Carbon (C, Z=6) — neutral ground-state configuration

    Svar

    [He] 2s² 2p²

  7. Kort 7

    Spørsmål

    Nitrogen (N, Z=7) — neutral ground-state configuration

    Svar

    [He] 2s² 2p³

  8. Kort 8

    Spørsmål

    Oxygen (O, Z=8) — neutral ground-state configuration

    Svar

    [He] 2s² 2p⁴

  9. Kort 9

    Spørsmål

    Fluorine (F, Z=9) — neutral ground-state configuration

    Svar

    [He] 2s² 2p⁵

  10. Kort 10

    Spørsmål

    Neon (Ne, Z=10) — neutral ground-state configuration

    Svar

    [He] 2s² 2p⁶

  11. Kort 11

    Spørsmål

    Sodium (Na, Z=11) — neutral ground-state configuration

    Svar

    [Ne] 3s¹

  12. Kort 12

    Spørsmål

    Magnesium (Mg, Z=12) — neutral ground-state configuration

    Svar

    [Ne] 3s²

  13. Kort 13

    Spørsmål

    Aluminum (Al, Z=13) — neutral ground-state configuration

    Svar

    [Ne] 3s² 3p¹

  14. Kort 14

    Spørsmål

    Silicon (Si, Z=14) — neutral ground-state configuration

    Svar

    [Ne] 3s² 3p²

  15. Kort 15

    Spørsmål

    Phosphorus (P, Z=15) — neutral ground-state configuration

    Svar

    [Ne] 3s² 3p³

  16. Kort 16

    Spørsmål

    Sulfur (S, Z=16) — neutral ground-state configuration

    Svar

    [Ne] 3s² 3p⁴

  17. Kort 17

    Spørsmål

    Chlorine (Cl, Z=17) — neutral ground-state configuration

    Svar

    [Ne] 3s² 3p⁵

  18. Kort 18

    Spørsmål

    Argon (Ar, Z=18) — neutral ground-state configuration

    Svar

    [Ne] 3s² 3p⁶

  19. Kort 19

    Spørsmål

    Potassium (K, Z=19) — neutral ground-state configuration

    Svar

    [Ar] 4s¹

  20. Kort 20

    Spørsmål

    Calcium (Ca, Z=20) — neutral ground-state configuration

    Svar

    [Ar] 4s²

  21. Kort 21

    Spørsmål

    Scandium (Sc, Z=21) — neutral ground-state configuration

    Svar

    [Ar] 3d¹ 4s²

  22. Kort 22

    Spørsmål

    Titanium (Ti, Z=22) — neutral ground-state configuration

    Svar

    [Ar] 3d² 4s²

  23. Kort 23

    Spørsmål

    Vanadium (V, Z=23) — neutral ground-state configuration

    Svar

    [Ar] 3d³ 4s²

  24. Kort 24

    Spørsmål

    Chromium (Cr, Z=24) — neutral ground-state configuration

    Svar

    [Ar] 3d⁵ 4s¹

  25. Kort 25

    Spørsmål

    Manganese (Mn, Z=25) — neutral ground-state configuration

    Svar

    [Ar] 3d⁵ 4s²

  26. Kort 26

    Spørsmål

    Iron (Fe, Z=26) — neutral ground-state configuration

    Svar

    [Ar] 3d⁶ 4s²

  27. Kort 27

    Spørsmål

    Cobalt (Co, Z=27) — neutral ground-state configuration

    Svar

    [Ar] 3d⁷ 4s²

  28. Kort 28

    Spørsmål

    Nickel (Ni, Z=28) — neutral ground-state configuration

    Svar

    [Ar] 3d⁸ 4s²

  29. Kort 29

    Spørsmål

    Copper (Cu, Z=29) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s¹

  30. Kort 30

    Spørsmål

    Zinc (Zn, Z=30) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s²

  31. Kort 31

    Spørsmål

    Gallium (Ga, Z=31) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s² 4p¹

  32. Kort 32

    Spørsmål

    Neutral ground-state configuration: [Ar] 3d⁵ 4s¹

    Svar

    Chromium (Cr, Z=24).

  33. Kort 33

    Spørsmål

    Germanium (Ge, Z=32) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s² 4p²

  34. Kort 34

    Spørsmål

    Arsenic (As, Z=33) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s² 4p³

  35. Kort 35

    Spørsmål

    Selenium (Se, Z=34) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s² 4p⁴

  36. Kort 36

    Spørsmål

    Bromine (Br, Z=35) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s² 4p⁵

  37. Kort 37

    Spørsmål

    Krypton (Kr, Z=36) — neutral ground-state configuration

    Svar

    [Ar] 3d¹⁰ 4s² 4p⁶

  38. Kort 38

    Spørsmål

    Neutral ground-state configuration: [Ar] 3d¹⁰ 4s¹

    Svar

    Copper (Cu, Z=29).

  39. Kort 39

    Spørsmål

    Rubidium (Rb, Z=37) — neutral ground-state configuration

    Svar

    [Kr] 5s¹

  40. Kort 40

    Spørsmål

    Strontium (Sr, Z=38) — neutral ground-state configuration

    Svar

    [Kr] 5s²

  41. Kort 41

    Spørsmål

    Yttrium (Y, Z=39) — neutral ground-state configuration

    Svar

    [Kr] 4d¹ 5s²

  42. Kort 42

    Spørsmål

    Zirconium (Zr, Z=40) — neutral ground-state configuration

    Svar

    [Kr] 4d² 5s²

  43. Kort 43

    Spørsmål

    Niobium (Nb, Z=41) — neutral ground-state configuration

    Svar

    [Kr] 4d⁴ 5s¹

  44. Kort 44

    Spørsmål

    Molybdenum (Mo, Z=42) — neutral ground-state configuration

    Svar

    [Kr] 4d⁵ 5s¹

  45. Kort 45

    Spørsmål

    Technetium (Tc, Z=43) — neutral ground-state configuration

    Svar

    [Kr] 4d⁵ 5s²

  46. Kort 46

    Spørsmål

    Ruthenium (Ru, Z=44) — neutral ground-state configuration

    Svar

    [Kr] 4d⁷ 5s¹

  47. Kort 47

    Spørsmål

    Rhodium (Rh, Z=45) — neutral ground-state configuration

    Svar

    [Kr] 4d⁸ 5s¹

  48. Kort 48

    Spørsmål

    Palladium (Pd, Z=46) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰

  49. Kort 49

    Spørsmål

    Silver (Ag, Z=47) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s¹

  50. Kort 50

    Spørsmål

    Cadmium (Cd, Z=48) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s²

  51. Kort 51

    Spørsmål

    Indium (In, Z=49) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s² 5p¹

  52. Kort 52

    Spørsmål

    Tin (Sn, Z=50) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s² 5p²

  53. Kort 53

    Spørsmål

    Neutral ground-state configuration: [Kr] 4d⁴ 5s¹

    Svar

    Niobium (Nb, Z=41).

  54. Kort 54

    Spørsmål

    Antimony (Sb, Z=51) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s² 5p³

  55. Kort 55

    Spørsmål

    Neutral ground-state configuration: [Kr] 4d⁵ 5s¹

    Svar

    Molybdenum (Mo, Z=42).

  56. Kort 56

    Spørsmål

    Tellurium (Te, Z=52) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s² 5p⁴

  57. Kort 57

    Spørsmål

    Iodine (I, Z=53) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s² 5p⁵

  58. Kort 58

    Spørsmål

    Neutral ground-state configuration: [Kr] 4d⁷ 5s¹

    Svar

    Ruthenium (Ru, Z=44).

  59. Kort 59

    Spørsmål

    Xenon (Xe, Z=54) — neutral ground-state configuration

    Svar

    [Kr] 4d¹⁰ 5s² 5p⁶

  60. Kort 60

    Spørsmål

    Neutral ground-state configuration: [Kr] 4d⁸ 5s¹

    Svar

    Rhodium (Rh, Z=45).

  61. Kort 61

    Spørsmål

    Cesium (Cs, Z=55) — neutral ground-state configuration

    Svar

    [Xe] 6s¹

  62. Kort 62

    Spørsmål

    Barium (Ba, Z=56) — neutral ground-state configuration

    Svar

    [Xe] 6s²

  63. Kort 63

    Spørsmål

    Neutral ground-state configuration: [Kr] 4d¹⁰

    Svar

    Palladium (Pd, Z=46).

  64. Kort 64

    Spørsmål

    Lanthanum (La, Z=57) — neutral ground-state configuration

    Svar

    [Xe] 5d¹ 6s²

  65. Kort 65

    Spørsmål

    Neutral ground-state configuration: [Kr] 4d¹⁰ 5s¹

    Svar

    Silver (Ag, Z=47).

  66. Kort 66

    Spørsmål

    Cerium (Ce, Z=58) — neutral ground-state configuration

    Svar

    [Xe] 4f¹ 5d¹ 6s²

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    Electron Configuration Flashcards: All 118 Elements

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  67. Kort 67

    Spørsmål

    Praseodymium (Pr, Z=59) — neutral ground-state configuration

    Svar

    [Xe] 4f³ 6s²

  68. Kort 68

    Spørsmål

    Neodymium (Nd, Z=60) — neutral ground-state configuration

    Svar

    [Xe] 4f⁴ 6s²

  69. Kort 69

    Spørsmål

    Promethium (Pm, Z=61) — neutral ground-state configuration

    Svar

    [Xe] 4f⁵ 6s²

  70. Kort 70

    Spørsmål

    Samarium (Sm, Z=62) — neutral ground-state configuration

    Svar

    [Xe] 4f⁶ 6s²

  71. Kort 71

    Spørsmål

    Europium (Eu, Z=63) — neutral ground-state configuration

    Svar

    [Xe] 4f⁷ 6s²

  72. Kort 72

    Spørsmål

    Gadolinium (Gd, Z=64) — neutral ground-state configuration

    Svar

    [Xe] 4f⁷ 5d¹ 6s²

  73. Kort 73

    Spørsmål

    Terbium (Tb, Z=65) — neutral ground-state configuration

    Svar

    [Xe] 4f⁹ 6s²

  74. Kort 74

    Spørsmål

    Dysprosium (Dy, Z=66) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁰ 6s²

  75. Kort 75

    Spørsmål

    Neutral ground-state configuration: [Xe] 4f¹ 5d¹ 6s²

    Svar

    Cerium (Ce, Z=58).

  76. Kort 76

    Spørsmål

    Holmium (Ho, Z=67) — neutral ground-state configuration

    Svar

    [Xe] 4f¹¹ 6s²

  77. Kort 77

    Spørsmål

    Erbium (Er, Z=68) — neutral ground-state configuration

    Svar

    [Xe] 4f¹² 6s²

  78. Kort 78

    Spørsmål

    Thulium (Tm, Z=69) — neutral ground-state configuration

    Svar

    [Xe] 4f¹³ 6s²

  79. Kort 79

    Spørsmål

    Ytterbium (Yb, Z=70) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 6s²

  80. Kort 80

    Spørsmål

    Lutetium (Lu, Z=71) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹ 6s²

  81. Kort 81

    Spørsmål

    Neutral ground-state configuration: [Xe] 4f⁷ 5d¹ 6s²

    Svar

    Gadolinium (Gd, Z=64).

  82. Kort 82

    Spørsmål

    Hafnium (Hf, Z=72) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d² 6s²

  83. Kort 83

    Spørsmål

    Tantalum (Ta, Z=73) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d³ 6s²

  84. Kort 84

    Spørsmål

    Tungsten (W, Z=74) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d⁴ 6s²

  85. Kort 85

    Spørsmål

    Rhenium (Re, Z=75) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d⁵ 6s²

  86. Kort 86

    Spørsmål

    Osmium (Os, Z=76) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d⁶ 6s²

  87. Kort 87

    Spørsmål

    Iridium (Ir, Z=77) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d⁷ 6s²

  88. Kort 88

    Spørsmål

    Platinum (Pt, Z=78) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d⁹ 6s¹

  89. Kort 89

    Spørsmål

    Gold (Au, Z=79) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s¹

  90. Kort 90

    Spørsmål

    Mercury (Hg, Z=80) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s²

  91. Kort 91

    Spørsmål

    Thallium (Tl, Z=81) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹

  92. Kort 92

    Spørsmål

    Lead (Pb, Z=82) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²

  93. Kort 93

    Spørsmål

    Bismuth (Bi, Z=83) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³

  94. Kort 94

    Spørsmål

    Polonium (Po, Z=84) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴

  95. Kort 95

    Spørsmål

    Neutral ground-state configuration: [Xe] 4f¹⁴ 5d⁹ 6s¹

    Svar

    Platinum (Pt, Z=78).

  96. Kort 96

    Spørsmål

    Astatine (At, Z=85) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵

  97. Kort 97

    Spørsmål

    Radon (Rn, Z=86) — neutral ground-state configuration

    Svar

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶

  98. Kort 98

    Spørsmål

    Neutral ground-state configuration: [Xe] 4f¹⁴ 5d¹⁰ 6s¹

    Svar

    Gold (Au, Z=79).

  99. Kort 99

    Spørsmål

    Francium (Fr, Z=87) — neutral ground-state configuration

    Svar

    [Rn] 7s¹

  100. Kort 100

    Spørsmål

    Radium (Ra, Z=88) — neutral ground-state configuration

    Svar

    [Rn] 7s²

  101. Kort 101

    Spørsmål

    Actinium (Ac, Z=89) — neutral ground-state configuration

    Svar

    [Rn] 6d¹ 7s²

  102. Kort 102

    Spørsmål

    Thorium (Th, Z=90) — neutral ground-state configuration

    Svar

    [Rn] 6d² 7s²

  103. Kort 103

    Spørsmål

    Protactinium (Pa, Z=91) — neutral ground-state configuration

    Svar

    [Rn] 5f² 6d¹ 7s²

  104. Kort 104

    Spørsmål

    Uranium (U, Z=92) — neutral ground-state configuration

    Svar

    [Rn] 5f³ 6d¹ 7s²

  105. Kort 105

    Spørsmål

    Neptunium (Np, Z=93) — neutral ground-state configuration

    Svar

    [Rn] 5f⁴ 6d¹ 7s²

  106. Kort 106

    Spørsmål

    Plutonium (Pu, Z=94) — neutral ground-state configuration

    Svar

    [Rn] 5f⁶ 7s²

  107. Kort 107

    Spørsmål

    Americium (Am, Z=95) — neutral ground-state configuration

    Svar

    [Rn] 5f⁷ 7s²

  108. Kort 108

    Spørsmål

    Curium (Cm, Z=96) — neutral ground-state configuration

    Svar

    [Rn] 5f⁷ 6d¹ 7s²

  109. Kort 109

    Spørsmål

    Berkelium (Bk, Z=97) — neutral ground-state configuration

    Svar

    [Rn] 5f⁹ 7s²

  110. Kort 110

    Spørsmål

    Californium (Cf, Z=98) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁰ 7s²

  111. Kort 111

    Spørsmål

    Einsteinium (Es, Z=99) — neutral ground-state configuration

    Svar

    [Rn] 5f¹¹ 7s²

  112. Kort 112

    Spørsmål

    Fermium (Fm, Z=100) — neutral ground-state configuration

    Svar

    [Rn] 5f¹² 7s²

  113. Kort 113

    Spørsmål

    Mendelevium (Md, Z=101) — neutral ground-state configuration

    Svar

    [Rn] 5f¹³ 7s²

  114. Kort 114

    Spørsmål

    Nobelium (No, Z=102) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 7s²

  115. Kort 115

    Spørsmål

    Lawrencium (Lr, Z=103) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 7s² 7p¹ — NIST ASD.

  116. Kort 116

    Spørsmål

    Rutherfordium (Rf, Z=104) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d² 7s²

  117. Kort 117

    Spørsmål

    Neutral ground-state configuration: [Rn] 5f⁷ 6d¹ 7s²

    Svar

    Curium (Cm, Z=96).

  118. Kort 118

    Spørsmål

    Dubnium (Db, Z=105) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d³ 7s²

  119. Kort 119

    Spørsmål

    Seaborgium (Sg, Z=106) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d⁴ 7s²

  120. Kort 120

    Spørsmål

    Bohrium (Bh, Z=107) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d⁵ 7s²

  121. Kort 121

    Spørsmål

    Hassium (Hs, Z=108) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d⁶ 7s²

  122. Kort 122

    Spørsmål

    Meitnerium (Mt, Z=109) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d⁷ 7s² — predicted by PubChem/LANL.

  123. Kort 123

    Spørsmål

    Darmstadtium (Ds, Z=110) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d⁸ 7s² — predicted by PubChem/LANL.

  124. Kort 124

    Spørsmål

    Roentgenium (Rg, Z=111) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d⁹ 7s² — predicted by PubChem/LANL.

  125. Kort 125

    Spørsmål

    Copernicium (Cn, Z=112) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d¹⁰ 7s² — predicted by PubChem/LANL.

  126. Kort 126

    Spørsmål

    Nihonium (Nh, Z=113) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹ — predicted by PubChem/LANL.

  127. Kort 127

    Spørsmål

    Flerovium (Fl, Z=114) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p² — predicted by PubChem/LANL.

  128. Kort 128

    Spørsmål

    Moscovium (Mc, Z=115) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³ — predicted by PubChem/LANL.

  129. Kort 129

    Spørsmål

    Livermorium (Lv, Z=116) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴ — predicted by PubChem/LANL.

  130. Kort 130

    Spørsmål

    Tennessine (Ts, Z=117) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵ — predicted by PubChem/LANL.

  131. Kort 131

    Spørsmål

    Oganesson (Og, Z=118) — neutral ground-state configuration

    Svar

    [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶ — predicted by PubChem/LANL.

Abstract atom with layered orbital paths around a luminous nucleus on a deep blue background.

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Electron Configuration Flashcards: All 118 Elements

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