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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.

By author Open Study Contributor

About this deck

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.

Cards in this deck

  1. Card 1

    Question

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

    Answer

    1s¹

  2. Card 2

    Question

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

    Answer

    1s²

  3. Card 3

    Question

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

    Answer

    [He] 2s¹

  4. Card 4

    Question

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

    Answer

    [He] 2s²

  5. Card 5

    Question

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

    Answer

    [He] 2s² 2p¹

  6. Card 6

    Question

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

    Answer

    [He] 2s² 2p²

  7. Card 7

    Question

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

    Answer

    [He] 2s² 2p³

  8. Card 8

    Question

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

    Answer

    [He] 2s² 2p⁴

  9. Card 9

    Question

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

    Answer

    [He] 2s² 2p⁵

  10. Card 10

    Question

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

    Answer

    [He] 2s² 2p⁶

  11. Card 11

    Question

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

    Answer

    [Ne] 3s¹

  12. Card 12

    Question

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

    Answer

    [Ne] 3s²

  13. Card 13

    Question

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

    Answer

    [Ne] 3s² 3p¹

  14. Card 14

    Question

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

    Answer

    [Ne] 3s² 3p²

  15. Card 15

    Question

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

    Answer

    [Ne] 3s² 3p³

  16. Card 16

    Question

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

    Answer

    [Ne] 3s² 3p⁴

  17. Card 17

    Question

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

    Answer

    [Ne] 3s² 3p⁵

  18. Card 18

    Question

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

    Answer

    [Ne] 3s² 3p⁶

  19. Card 19

    Question

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

    Answer

    [Ar] 4s¹

  20. Card 20

    Question

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

    Answer

    [Ar] 4s²

  21. Card 21

    Question

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

    Answer

    [Ar] 3d¹ 4s²

  22. Card 22

    Question

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

    Answer

    [Ar] 3d² 4s²

  23. Card 23

    Question

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

    Answer

    [Ar] 3d³ 4s²

  24. Card 24

    Question

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

    Answer

    [Ar] 3d⁵ 4s¹

  25. Card 25

    Question

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

    Answer

    [Ar] 3d⁵ 4s²

  26. Card 26

    Question

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

    Answer

    [Ar] 3d⁶ 4s²

  27. Card 27

    Question

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

    Answer

    [Ar] 3d⁷ 4s²

  28. Card 28

    Question

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

    Answer

    [Ar] 3d⁸ 4s²

  29. Card 29

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s¹

  30. Card 30

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s²

  31. Card 31

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s² 4p¹

  32. Card 32

    Question

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

    Answer

    Chromium (Cr, Z=24).

  33. Card 33

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s² 4p²

  34. Card 34

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s² 4p³

  35. Card 35

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s² 4p⁴

  36. Card 36

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s² 4p⁵

  37. Card 37

    Question

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

    Answer

    [Ar] 3d¹⁰ 4s² 4p⁶

  38. Card 38

    Question

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

    Answer

    Copper (Cu, Z=29).

  39. Card 39

    Question

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

    Answer

    [Kr] 5s¹

  40. Card 40

    Question

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

    Answer

    [Kr] 5s²

  41. Card 41

    Question

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

    Answer

    [Kr] 4d¹ 5s²

  42. Card 42

    Question

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

    Answer

    [Kr] 4d² 5s²

  43. Card 43

    Question

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

    Answer

    [Kr] 4d⁴ 5s¹

  44. Card 44

    Question

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

    Answer

    [Kr] 4d⁵ 5s¹

  45. Card 45

    Question

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

    Answer

    [Kr] 4d⁵ 5s²

  46. Card 46

    Question

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

    Answer

    [Kr] 4d⁷ 5s¹

  47. Card 47

    Question

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

    Answer

    [Kr] 4d⁸ 5s¹

  48. Card 48

    Question

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

    Answer

    [Kr] 4d¹⁰

  49. Card 49

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s¹

  50. Card 50

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s²

  51. Card 51

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s² 5p¹

  52. Card 52

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s² 5p²

  53. Card 53

    Question

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

    Answer

    Niobium (Nb, Z=41).

  54. Card 54

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s² 5p³

  55. Card 55

    Question

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

    Answer

    Molybdenum (Mo, Z=42).

  56. Card 56

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s² 5p⁴

  57. Card 57

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s² 5p⁵

  58. Card 58

    Question

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

    Answer

    Ruthenium (Ru, Z=44).

  59. Card 59

    Question

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

    Answer

    [Kr] 4d¹⁰ 5s² 5p⁶

  60. Card 60

    Question

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

    Answer

    Rhodium (Rh, Z=45).

  61. Card 61

    Question

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

    Answer

    [Xe] 6s¹

  62. Card 62

    Question

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

    Answer

    [Xe] 6s²

  63. Card 63

    Question

    Neutral ground-state configuration: [Kr] 4d¹⁰

    Answer

    Palladium (Pd, Z=46).

  64. Card 64

    Question

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

    Answer

    [Xe] 5d¹ 6s²

  65. Card 65

    Question

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

    Answer

    Silver (Ag, Z=47).

  66. Card 66

    Question

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

    Answer

    [Xe] 4f¹ 5d¹ 6s²

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

    131 cards

    Electron Configuration Flashcards: All 118 Elements

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  67. Card 67

    Question

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

    Answer

    [Xe] 4f³ 6s²

  68. Card 68

    Question

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

    Answer

    [Xe] 4f⁴ 6s²

  69. Card 69

    Question

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

    Answer

    [Xe] 4f⁵ 6s²

  70. Card 70

    Question

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

    Answer

    [Xe] 4f⁶ 6s²

  71. Card 71

    Question

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

    Answer

    [Xe] 4f⁷ 6s²

  72. Card 72

    Question

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

    Answer

    [Xe] 4f⁷ 5d¹ 6s²

  73. Card 73

    Question

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

    Answer

    [Xe] 4f⁹ 6s²

  74. Card 74

    Question

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

    Answer

    [Xe] 4f¹⁰ 6s²

  75. Card 75

    Question

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

    Answer

    Cerium (Ce, Z=58).

  76. Card 76

    Question

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

    Answer

    [Xe] 4f¹¹ 6s²

  77. Card 77

    Question

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

    Answer

    [Xe] 4f¹² 6s²

  78. Card 78

    Question

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

    Answer

    [Xe] 4f¹³ 6s²

  79. Card 79

    Question

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

    Answer

    [Xe] 4f¹⁴ 6s²

  80. Card 80

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹ 6s²

  81. Card 81

    Question

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

    Answer

    Gadolinium (Gd, Z=64).

  82. Card 82

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d² 6s²

  83. Card 83

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d³ 6s²

  84. Card 84

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d⁴ 6s²

  85. Card 85

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d⁵ 6s²

  86. Card 86

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d⁶ 6s²

  87. Card 87

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d⁷ 6s²

  88. Card 88

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d⁹ 6s¹

  89. Card 89

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s¹

  90. Card 90

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s²

  91. Card 91

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹

  92. Card 92

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²

  93. Card 93

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³

  94. Card 94

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴

  95. Card 95

    Question

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

    Answer

    Platinum (Pt, Z=78).

  96. Card 96

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵

  97. Card 97

    Question

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

    Answer

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶

  98. Card 98

    Question

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

    Answer

    Gold (Au, Z=79).

  99. Card 99

    Question

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

    Answer

    [Rn] 7s¹

  100. Card 100

    Question

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

    Answer

    [Rn] 7s²

  101. Card 101

    Question

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

    Answer

    [Rn] 6d¹ 7s²

  102. Card 102

    Question

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

    Answer

    [Rn] 6d² 7s²

  103. Card 103

    Question

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

    Answer

    [Rn] 5f² 6d¹ 7s²

  104. Card 104

    Question

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

    Answer

    [Rn] 5f³ 6d¹ 7s²

  105. Card 105

    Question

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

    Answer

    [Rn] 5f⁴ 6d¹ 7s²

  106. Card 106

    Question

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

    Answer

    [Rn] 5f⁶ 7s²

  107. Card 107

    Question

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

    Answer

    [Rn] 5f⁷ 7s²

  108. Card 108

    Question

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

    Answer

    [Rn] 5f⁷ 6d¹ 7s²

  109. Card 109

    Question

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

    Answer

    [Rn] 5f⁹ 7s²

  110. Card 110

    Question

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

    Answer

    [Rn] 5f¹⁰ 7s²

  111. Card 111

    Question

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

    Answer

    [Rn] 5f¹¹ 7s²

  112. Card 112

    Question

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

    Answer

    [Rn] 5f¹² 7s²

  113. Card 113

    Question

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

    Answer

    [Rn] 5f¹³ 7s²

  114. Card 114

    Question

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

    Answer

    [Rn] 5f¹⁴ 7s²

  115. Card 115

    Question

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

    Answer

    [Rn] 5f¹⁴ 7s² 7p¹ — NIST ASD.

  116. Card 116

    Question

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

    Answer

    [Rn] 5f¹⁴ 6d² 7s²

  117. Card 117

    Question

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

    Answer

    Curium (Cm, Z=96).

  118. Card 118

    Question

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

    Answer

    [Rn] 5f¹⁴ 6d³ 7s²

  119. Card 119

    Question

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

    Answer

    [Rn] 5f¹⁴ 6d⁴ 7s²

  120. Card 120

    Question

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

    Answer

    [Rn] 5f¹⁴ 6d⁵ 7s²

  121. Card 121

    Question

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

    Answer

    [Rn] 5f¹⁴ 6d⁶ 7s²

  122. Card 122

    Question

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

    Answer

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

  123. Card 123

    Question

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

    Answer

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

  124. Card 124

    Question

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

    Answer

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

  125. Card 125

    Question

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

    Answer

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

  126. Card 126

    Question

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

    Answer

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

  127. Card 127

    Question

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

    Answer

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

  128. Card 128

    Question

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

    Answer

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

  129. Card 129

    Question

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

    Answer

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

  130. Card 130

    Question

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

    Answer

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

  131. Card 131

    Question

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

    Answer

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

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

131 cards

Electron Configuration Flashcards: All 118 Elements

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Flashcards opens so you can start studying.