State the common oxidation state of :
Actinides

Explanation

To determine the common oxidation state of actinides, we can follow these steps:

### Step 1: Identify the actinide series
The actinide series consists of 15 elements, from actinium (Ac, atomic number 89) to lawrencium (Lr, atomic number 103).

### Step 2: Understand the electronic configuration
The general electronic configuration of actinides can be represented as:
\[ \text{Rn} \, 5f^{1-14} \, 6d^{0-1} \, 7s^2 \]
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