Niobium (Nh): Bohr Model, Protons, Neutrons & Electrons
Niobium is element number 113, a superheavy in group 13, period 7. Its atom has 113 protons, 173 neutrons and 113 electrons arranged in 7 shells: 2, 8, 18, 32, 32, 18, 3.
- 113 protons
- 173 neutrons
- 113 electrons
Protons, neutrons and electrons in nihonium
Le atomic number of nihonium is 113, so every nihonium atom has 113 protons. A neutral atom has the same number of electrons, 113. The number of neutrons depends on the isotope: neutrons = mass number − atomic number. For nihonium-286, that is 286 − 113 = 173 neutrons. Every isotope of nihonium is radioactive; 286 is the mass number of its most stable one.
How to draw the Bohr model of nihonium
- Draw the nucleus and write 113 p⁺ et 173 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 3 electrons on it.
- Check: 2 + 8 + 18 + 32 + 32 + 18 + 3 = 113 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, 3) is the one to draw.
Electron configuration
The electron configuration of nihonium is [Rn] 7s² 5f¹⁴ 6d¹⁰ 7p¹. Its 3 outer electrons decide how it reacts: it usually shares electrons in covalent bonds.
Key facts about nihonium
| Symbol | Nh |
|---|---|
| Atomic number | 113 |
| Relative atomic mass | [286] |
| Group · period · block | group 13 · period 7 · p-block |
| Type | Super lourd |
| State at 25 °C | unknown |
| Couches électroniques | 2, 8, 18, 32, 32, 18, 3 |
| Electron configuration | [Rn] 7s² 5f¹⁴ 6d¹⁰ 7p¹ |
| Électrons de valence | 3 |
| Common ion | — |
| Electronegativity (Pauling) | — |
| First ionisation energy | — |
| Atomic radius (empirical) | — |
Où nihonium sits on the periodic table
Foire aux questions
How many protons, neutrons and electrons does nihonium have?
Nihonium has 113 protons and 113 electrons (atomic number 113). Its most common isotope, nihonium-286, has 286 − 113 = 173 neutrons.
What is the electron configuration of nihonium?
[Rn] 7s² 5f¹⁴ 6d¹⁰ 7p¹. In shells that is 2, 8, 18, 32, 32, 18, 3.
How many valence electrons does nihonium have?
3. Nihonium is in group 13, and its outer shell holds 3 electrons.
Where is nihonium on the periodic table?
In group 13, period 7, in the p-block. It is a superheavy.
