Write the number of types of valencies present for metals in complexes according to Werner.

Explanation

To answer the question regarding the number of types of valencies present for metals in complexes according to Werner, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Valencies in Coordination Compounds**:
- According to Alfred Werner, valencies in coordination compounds can be classified into two distinct types: primary valency and secondary valency.

2. **Defining Primary Valency**:
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