The electronic configuration of an element is `3d^5 4s^1`. Write its (i) most stable oxidation state (ii) most oxidising state.

Explanation

To solve the question regarding the electronic configuration `3d^5 4s^1`, we can break it down into two parts: identifying the most stable oxidation state and the most oxidizing state of the element.

### Step-by-Step Solution:

1. **Identify the Element**:
The electronic configuration `3d^5 4s^1` corresponds to the element Chromium (Cr). Chromium is located in the d-block of the periodic table.

**Hint**: Look for the element with the given electronic configuration in the periodic table.
...