Using IUPAC norms write the formulae for the following :
Potassium tetracyanidonickelate (II)

Explanation

To write the formula for potassium tetracyanidonickelate (II) using IUPAC norms, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Components**:
- The compound name consists of three parts: "Potassium", "Tetracyanido", and "Nickelate (II)".
- "Potassium" indicates the presence of potassium ions (K⁺).
- "Tetracyanido" indicates the presence of four cyanide ions (CN⁻).
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