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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.

مصنف Open Study Contributor

اس ڈیک کے بارے میں

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.

اس ڈیک کے کارڈز

  1. کارڈ 1

    سوال

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

    جواب

    1s¹

  2. کارڈ 2

    سوال

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

    جواب

    1s²

  3. کارڈ 3

    سوال

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

    جواب

    [He] 2s¹

  4. کارڈ 4

    سوال

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

    جواب

    [He] 2s²

  5. کارڈ 5

    سوال

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

    جواب

    [He] 2s² 2p¹

  6. کارڈ 6

    سوال

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

    جواب

    [He] 2s² 2p²

  7. کارڈ 7

    سوال

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

    جواب

    [He] 2s² 2p³

  8. کارڈ 8

    سوال

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

    جواب

    [He] 2s² 2p⁴

  9. کارڈ 9

    سوال

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

    جواب

    [He] 2s² 2p⁵

  10. کارڈ 10

    سوال

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

    جواب

    [He] 2s² 2p⁶

  11. کارڈ 11

    سوال

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

    جواب

    [Ne] 3s¹

  12. کارڈ 12

    سوال

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

    جواب

    [Ne] 3s²

  13. کارڈ 13

    سوال

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

    جواب

    [Ne] 3s² 3p¹

  14. کارڈ 14

    سوال

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

    جواب

    [Ne] 3s² 3p²

  15. کارڈ 15

    سوال

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

    جواب

    [Ne] 3s² 3p³

  16. کارڈ 16

    سوال

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

    جواب

    [Ne] 3s² 3p⁴

  17. کارڈ 17

    سوال

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

    جواب

    [Ne] 3s² 3p⁵

  18. کارڈ 18

    سوال

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

    جواب

    [Ne] 3s² 3p⁶

  19. کارڈ 19

    سوال

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

    جواب

    [Ar] 4s¹

  20. کارڈ 20

    سوال

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

    جواب

    [Ar] 4s²

  21. کارڈ 21

    سوال

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

    جواب

    [Ar] 3d¹ 4s²

  22. کارڈ 22

    سوال

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

    جواب

    [Ar] 3d² 4s²

  23. کارڈ 23

    سوال

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

    جواب

    [Ar] 3d³ 4s²

  24. کارڈ 24

    سوال

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

    جواب

    [Ar] 3d⁵ 4s¹

  25. کارڈ 25

    سوال

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

    جواب

    [Ar] 3d⁵ 4s²

  26. کارڈ 26

    سوال

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

    جواب

    [Ar] 3d⁶ 4s²

  27. کارڈ 27

    سوال

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

    جواب

    [Ar] 3d⁷ 4s²

  28. کارڈ 28

    سوال

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

    جواب

    [Ar] 3d⁸ 4s²

  29. کارڈ 29

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s¹

  30. کارڈ 30

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s²

  31. کارڈ 31

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s² 4p¹

  32. کارڈ 32

    سوال

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

    جواب

    Chromium (Cr, Z=24).

  33. کارڈ 33

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s² 4p²

  34. کارڈ 34

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s² 4p³

  35. کارڈ 35

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s² 4p⁴

  36. کارڈ 36

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s² 4p⁵

  37. کارڈ 37

    سوال

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

    جواب

    [Ar] 3d¹⁰ 4s² 4p⁶

  38. کارڈ 38

    سوال

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

    جواب

    Copper (Cu, Z=29).

  39. کارڈ 39

    سوال

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

    جواب

    [Kr] 5s¹

  40. کارڈ 40

    سوال

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

    جواب

    [Kr] 5s²

  41. کارڈ 41

    سوال

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

    جواب

    [Kr] 4d¹ 5s²

  42. کارڈ 42

    سوال

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

    جواب

    [Kr] 4d² 5s²

  43. کارڈ 43

    سوال

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

    جواب

    [Kr] 4d⁴ 5s¹

  44. کارڈ 44

    سوال

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

    جواب

    [Kr] 4d⁵ 5s¹

  45. کارڈ 45

    سوال

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

    جواب

    [Kr] 4d⁵ 5s²

  46. کارڈ 46

    سوال

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

    جواب

    [Kr] 4d⁷ 5s¹

  47. کارڈ 47

    سوال

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

    جواب

    [Kr] 4d⁸ 5s¹

  48. کارڈ 48

    سوال

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

    جواب

    [Kr] 4d¹⁰

  49. کارڈ 49

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s¹

  50. کارڈ 50

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s²

  51. کارڈ 51

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s² 5p¹

  52. کارڈ 52

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s² 5p²

  53. کارڈ 53

    سوال

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

    جواب

    Niobium (Nb, Z=41).

  54. کارڈ 54

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s² 5p³

  55. کارڈ 55

    سوال

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

    جواب

    Molybdenum (Mo, Z=42).

  56. کارڈ 56

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s² 5p⁴

  57. کارڈ 57

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s² 5p⁵

  58. کارڈ 58

    سوال

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

    جواب

    Ruthenium (Ru, Z=44).

  59. کارڈ 59

    سوال

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

    جواب

    [Kr] 4d¹⁰ 5s² 5p⁶

  60. کارڈ 60

    سوال

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

    جواب

    Rhodium (Rh, Z=45).

  61. کارڈ 61

    سوال

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

    جواب

    [Xe] 6s¹

  62. کارڈ 62

    سوال

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

    جواب

    [Xe] 6s²

  63. کارڈ 63

    سوال

    Neutral ground-state configuration: [Kr] 4d¹⁰

    جواب

    Palladium (Pd, Z=46).

  64. کارڈ 64

    سوال

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

    جواب

    [Xe] 5d¹ 6s²

  65. کارڈ 65

    سوال

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

    جواب

    Silver (Ag, Z=47).

  66. کارڈ 66

    سوال

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

    جواب

    [Xe] 4f¹ 5d¹ 6s²

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

    131 کارڈز

    Electron Configuration Flashcards: All 118 Elements

    یہ ڈیک مفت پڑھیں

    مطالعہ شروع کرنے کے لیے Nibomo کھلے گا۔

  67. کارڈ 67

    سوال

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

    جواب

    [Xe] 4f³ 6s²

  68. کارڈ 68

    سوال

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

    جواب

    [Xe] 4f⁴ 6s²

  69. کارڈ 69

    سوال

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

    جواب

    [Xe] 4f⁵ 6s²

  70. کارڈ 70

    سوال

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

    جواب

    [Xe] 4f⁶ 6s²

  71. کارڈ 71

    سوال

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

    جواب

    [Xe] 4f⁷ 6s²

  72. کارڈ 72

    سوال

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

    جواب

    [Xe] 4f⁷ 5d¹ 6s²

  73. کارڈ 73

    سوال

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

    جواب

    [Xe] 4f⁹ 6s²

  74. کارڈ 74

    سوال

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

    جواب

    [Xe] 4f¹⁰ 6s²

  75. کارڈ 75

    سوال

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

    جواب

    Cerium (Ce, Z=58).

  76. کارڈ 76

    سوال

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

    جواب

    [Xe] 4f¹¹ 6s²

  77. کارڈ 77

    سوال

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

    جواب

    [Xe] 4f¹² 6s²

  78. کارڈ 78

    سوال

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

    جواب

    [Xe] 4f¹³ 6s²

  79. کارڈ 79

    سوال

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

    جواب

    [Xe] 4f¹⁴ 6s²

  80. کارڈ 80

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹ 6s²

  81. کارڈ 81

    سوال

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

    جواب

    Gadolinium (Gd, Z=64).

  82. کارڈ 82

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d² 6s²

  83. کارڈ 83

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d³ 6s²

  84. کارڈ 84

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d⁴ 6s²

  85. کارڈ 85

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d⁵ 6s²

  86. کارڈ 86

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d⁶ 6s²

  87. کارڈ 87

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d⁷ 6s²

  88. کارڈ 88

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d⁹ 6s¹

  89. کارڈ 89

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s¹

  90. کارڈ 90

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s²

  91. کارڈ 91

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹

  92. کارڈ 92

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²

  93. کارڈ 93

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³

  94. کارڈ 94

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴

  95. کارڈ 95

    سوال

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

    جواب

    Platinum (Pt, Z=78).

  96. کارڈ 96

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵

  97. کارڈ 97

    سوال

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

    جواب

    [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶

  98. کارڈ 98

    سوال

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

    جواب

    Gold (Au, Z=79).

  99. کارڈ 99

    سوال

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

    جواب

    [Rn] 7s¹

  100. کارڈ 100

    سوال

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

    جواب

    [Rn] 7s²

  101. کارڈ 101

    سوال

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

    جواب

    [Rn] 6d¹ 7s²

  102. کارڈ 102

    سوال

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

    جواب

    [Rn] 6d² 7s²

  103. کارڈ 103

    سوال

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

    جواب

    [Rn] 5f² 6d¹ 7s²

  104. کارڈ 104

    سوال

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

    جواب

    [Rn] 5f³ 6d¹ 7s²

  105. کارڈ 105

    سوال

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

    جواب

    [Rn] 5f⁴ 6d¹ 7s²

  106. کارڈ 106

    سوال

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

    جواب

    [Rn] 5f⁶ 7s²

  107. کارڈ 107

    سوال

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

    جواب

    [Rn] 5f⁷ 7s²

  108. کارڈ 108

    سوال

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

    جواب

    [Rn] 5f⁷ 6d¹ 7s²

  109. کارڈ 109

    سوال

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

    جواب

    [Rn] 5f⁹ 7s²

  110. کارڈ 110

    سوال

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

    جواب

    [Rn] 5f¹⁰ 7s²

  111. کارڈ 111

    سوال

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

    جواب

    [Rn] 5f¹¹ 7s²

  112. کارڈ 112

    سوال

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

    جواب

    [Rn] 5f¹² 7s²

  113. کارڈ 113

    سوال

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

    جواب

    [Rn] 5f¹³ 7s²

  114. کارڈ 114

    سوال

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

    جواب

    [Rn] 5f¹⁴ 7s²

  115. کارڈ 115

    سوال

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

    جواب

    [Rn] 5f¹⁴ 7s² 7p¹ — NIST ASD.

  116. کارڈ 116

    سوال

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

    جواب

    [Rn] 5f¹⁴ 6d² 7s²

  117. کارڈ 117

    سوال

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

    جواب

    Curium (Cm, Z=96).

  118. کارڈ 118

    سوال

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

    جواب

    [Rn] 5f¹⁴ 6d³ 7s²

  119. کارڈ 119

    سوال

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

    جواب

    [Rn] 5f¹⁴ 6d⁴ 7s²

  120. کارڈ 120

    سوال

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

    جواب

    [Rn] 5f¹⁴ 6d⁵ 7s²

  121. کارڈ 121

    سوال

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

    جواب

    [Rn] 5f¹⁴ 6d⁶ 7s²

  122. کارڈ 122

    سوال

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

    جواب

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

  123. کارڈ 123

    سوال

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

    جواب

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

  124. کارڈ 124

    سوال

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

    جواب

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

  125. کارڈ 125

    سوال

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

    جواب

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

  126. کارڈ 126

    سوال

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

    جواب

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

  127. کارڈ 127

    سوال

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

    جواب

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

  128. کارڈ 128

    سوال

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

    جواب

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

  129. کارڈ 129

    سوال

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

    جواب

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

  130. کارڈ 130

    سوال

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

    جواب

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

  131. کارڈ 131

    سوال

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

    جواب

    [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 کارڈز

Electron Configuration Flashcards: All 118 Elements

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