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Atoms · Actinides: 15 3D models

Every element as an atom, orbitals and bonding, crystals, ions and complexes, real compounds from every field of chemistry, substances in their natural form, electrochemistry and lab experiments (real sizes atoms → lab bench). Each one is a ready-made 3D model you can turn, recolour and place in a figure — open BioDioRama and type its name in the Library search.

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Actinium atom (Ac) — Actinium (Ac), atomic number 89 — actinide, period 7. 89 protons, about 138 neutrons in its commonest isotope, and 89 electrons in shells 2, 8, 18, 32, 18, 9, 2 ([Rn] 6d¹ 7s²). Standard atomic weight 227. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Thorium atom (Th) — Thorium (Th), atomic number 90 — actinide, period 7. 90 protons, about 142 neutrons in its commonest isotope, and 90 electrons in shells 2, 8, 18, 32, 18, 10, 2 ([Rn] 6d² 7s²). Standard atomic weight 232.04. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Protactinium atom (Pa) — Protactinium (Pa), atomic number 91 — actinide, period 7. 91 protons, about 140 neutrons in its commonest isotope, and 91 electrons in shells 2, 8, 18, 32, 20, 9, 2 ([Rn] 5f² 6d¹ 7s²). Standard atomic weight 231.04. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Uranium atom (U) — Uranium (U), atomic number 92 — actinide, period 7. 92 protons, about 146 neutrons in its commonest isotope, and 92 electrons in shells 2, 8, 18, 32, 21, 9, 2 ([Rn] 5f³ 6d¹ 7s²). Standard atomic weight 238.03. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Neptunium atom (Np) — Neptunium (Np), atomic number 93 — actinide, period 7. 93 protons, about 144 neutrons in its commonest isotope, and 93 electrons in shells 2, 8, 18, 32, 22, 9, 2 ([Rn] 5f⁴ 6d¹ 7s²). Standard atomic weight 237. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Plutonium atom (Pu) — Plutonium (Pu), atomic number 94 — actinide, period 7. 94 protons, about 150 neutrons in its commonest isotope, and 94 electrons in shells 2, 8, 18, 32, 24, 8, 2 ([Rn] 5f⁶ 7s²). Standard atomic weight 244. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Americium atom (Am) — Americium (Am), atomic number 95 — actinide, period 7. 95 protons, about 148 neutrons in its commonest isotope, and 95 electrons in shells 2, 8, 18, 32, 25, 8, 2 ([Rn] 5f⁷ 7s²). Standard atomic weight 243. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Curium atom (Cm) — Curium (Cm), atomic number 96 — actinide, period 7. 96 protons, about 151 neutrons in its commonest isotope, and 96 electrons in shells 2, 8, 18, 32, 25, 9, 2 ([Rn] 5f⁷ 6d¹ 7s²). Standard atomic weight 247. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Berkelium atom (Bk) — Berkelium (Bk), atomic number 97 — actinide, period 7. 97 protons, about 150 neutrons in its commonest isotope, and 97 electrons in shells 2, 8, 18, 32, 27, 8, 2 ([Rn] 5f⁹ 7s²). Standard atomic weight 247. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Californium atom (Cf) — Californium (Cf), atomic number 98 — actinide, period 7. 98 protons, about 153 neutrons in its commonest isotope, and 98 electrons in shells 2, 8, 18, 32, 28, 8, 2 ([Rn] 5f¹⁰ 7s²). Standard atomic weight 251. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Einsteinium atom (Es) — Einsteinium (Es), atomic number 99 — actinide, period 7. 99 protons, about 153 neutrons in its commonest isotope, and 99 electrons in shells 2, 8, 18, 32, 29, 8, 2 ([Rn] 5f¹¹ 7s²). Standard atomic weight 252. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Fermium atom (Fm) — Fermium (Fm), atomic number 100 — actinide, period 7. 100 protons, about 157 neutrons in its commonest isotope, and 100 electrons in shells 2, 8, 18, 32, 30, 8, 2 ([Rn] 5f¹² 7s²). Standard atomic weight 257. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Mendelevium atom (Md) — Mendelevium (Md), atomic number 101 — actinide, period 7. 101 protons, about 157 neutrons in its commonest isotope, and 101 electrons in shells 2, 8, 18, 32, 31, 8, 2 ([Rn] 5f¹³ 7s²). Standard atomic weight 258. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Nobelium atom (No) — Nobelium (No), atomic number 102 — actinide, period 7. 102 protons, about 157 neutrons in its commonest isotope, and 102 electrons in shells 2, 8, 18, 32, 32, 8, 2 ([Rn] 5f¹⁴ 7s²). Standard atomic weight 259. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))
Lawrencium atom (Lr) — Lawrencium (Lr), atomic number 103 — actinide, period 7. 103 protons, about 163 neutrons in its commonest isotope, and 103 electrons in shells 2, 8, 18, 32, 32, 8, 3 ([Rn] 5f¹⁴ 7s² 7p¹). Standard atomic weight 266. (≈ 0.1–0.5 nm across (the nucleus is ~100,000× smaller than drawn))