Valence Electrons in Nobelium (No)
Calculate the number of valence electrons in Nobelium using its electron configuration step by step.
Valence Electrons in Nobelium
Determine the number of valence electrons in Nobelium (No, Element 102)
Step 1: Look up the electronic configuration for Nobelium
The abbreviated (condensed) ground electronic configuration for Nobelium is:
[Rn] 5f14 7s2
Calculate Electronic Configuration for Nobelium
Step 2: Identify the outermost electrons using the electronic configuration
Electrons in atomic orbitals outside the [Rn] core are the outermost electrons:
5f14 7s2
Step 3: Use the principle quantum number to identify the valence electrons
Extract the principle quantum number, n, and number of electrons from the electron configuration:
| Electron Configuration | n | Orbital | Number of Electrons |
|---|---|---|---|
| 5f14 | 5 | f | 14 |
| 7s2 | 7 | s | 2 |
The outermost electrons with the largest principal quantum number (in this case, n = 7) are valence electrons.
Answer
Nobelium (No) has 2 valence electron(s).
