Oganesón (Og): Bohr Model, Protons, Neutrons & Electrons
Oganesón is element number 118, a superheavy in group 18, period 7. Its atom has 118 protons, 176 neutrons and 118 electrons arranged in 7 shells: 2, 8, 18, 32, 32, 18, 8.
- 118 protons
- 176 neutrons
- 118 electrons
Protons, neutrons and electrons in oganesson
El atomic number of oganesson is 118, so every oganesson atom has 118 protons. A neutral atom has the same number of electrons, 118. The number of neutrons depends on the isotope: neutrons = mass number − atomic number. For oganesson-294, that is 294 − 118 = 176 neutrons. Every isotope of oganesson is radioactive; 294 is the mass number of its most stable one.
How to draw the Bohr model of oganesson
- Draw the nucleus and write 118 p⁺ y 176 n⁰ inside it.
- Draw the first shell and put 2 electrons on it (the first shell holds at most 2).
- Draw the second shell and put 8 electrons on it.
- Draw the third shell and put 18 electrons on it.
- Draw the fourth shell and put 32 electrons on it.
- Draw the fifth shell and put 32 electrons on it.
- Draw the sixth shell and put 18 electrons on it.
- Draw the seventh shell and put 8 electrons on it.
- Check: 2 + 8 + 18 + 32 + 32 + 18 + 8 = 118 electrons, the same as the number of protons.
From potassium onwards the shells don’t simply fill as 2, 8, 8: the fourth shell starts before the third is full, so the real arrangement above (2, 8, 18, 32, 32, 18, 8) is the one to draw.
Electron configuration
The electron configuration of oganesson is [Rn] 7s² 5f¹⁴ 6d¹⁰ 7p⁶. Its 8 outer electrons decide how it reacts: it usually shares electrons in covalent bonds.
Key facts about oganesson
| Symbol | Og |
|---|---|
| Atomic number | 118 |
| Relative atomic mass | [294] |
| Group · period · block | group 18 · period 7 · p-block |
| Tipo | Sobrepesado |
| State at 25 °C | unknown |
| Capas electrónicas | 2, 8, 18, 32, 32, 18, 8 |
| Electron configuration | [Rn] 7s² 5f¹⁴ 6d¹⁰ 7p⁶ |
| Electrones de valencia | 8 |
| Common ion | — |
| Electronegativity (Pauling) | — |
| First ionisation energy | — |
| Atomic radius (empirical) | — |
¿Dónde oganesson sits on the periodic table
Preguntas frecuentes
How many protons, neutrons and electrons does oganesson have?
Oganesson has 118 protons and 118 electrons (atomic number 118). Its most common isotope, oganesson-294, has 294 − 118 = 176 neutrons.
What is the electron configuration of oganesson?
[Rn] 7s² 5f¹⁴ 6d¹⁰ 7p⁶. In shells that is 2, 8, 18, 32, 32, 18, 8.
How many valence electrons does oganesson have?
8. Oganesson is in group 18, and its outer shell holds 8 electrons.
Where is oganesson on the periodic table?
In group 18, period 7, in the p-block. It is a superheavy.
