Element X is a metal with a valency 2, Y is a non metal with a valency 3.
Write an equation to show how Y forms an ion.

Explanation

To show how element Y (a non-metal with a valency of 3) forms an ion, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Element Y**:
Since Y is a non-metal with a valency of 3, it is likely to be nitrogen (N), which is in group 15 of the periodic table and has the electronic configuration of 2,5.

2. **Determine the Electron Configuration of Y**:
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