Give the number of ligands which are monodentate as well as ambidentate
`overset(Θ)(CN),C_(2)O_(4)^(2-),S_(2)^(2-),NO_(2)^(Θ), overset(Θ)OCN,SCN^(Θ` .

Explanation

To solve the question, we need to identify the ligands from the given list that are both monodentate and ambidentate.

### Step-by-Step Solution:

1. **Understand Monodentate and Ambidentate Ligands:**
- **Monodentate Ligands:** These ligands have only one donor atom that can coordinate to the central metal atom. Examples include halides and cyanide (CN⁻).
- **Ambidentate Ligands:** These ligands can coordinate through two different atoms, but they still function as monodentate ligands in the context of coordination. Examples include thiocyanate (SCN⁻), which can bind through sulfur or nitrogen.

2. **List the Given Ligands:**
- CN⁻ (Cyanide)
- C₂O₄²⁻ (Oxalate)
- S₂²⁻ (Disulfide)
- NO₂⁻ (Nitrite)
- OCN⁻ (Cyanate)
- SCN⁻ (Thiocyanate)

3. **Identify Monodentate Ligands:**
- CN⁻: Monodentate (can bind through carbon or nitrogen, but typically binds through carbon).
- C₂O₄²⁻: Bidentate (binds through both oxygen atoms).
- S₂²⁻: Monodentate (can bind through one sulfur atom).
- NO₂⁻: Monodentate (binds through nitrogen).
- OCN⁻: Ambidentate (can bind through oxygen or carbon).
- SCN⁻: Ambidentate (can bind through sulfur or nitrogen).

4. **Identify Ambidentate Ligands:**
- CN⁻: Ambidentate (can bind through carbon or nitrogen).
- OCN⁻: Ambidentate (can bind through oxygen or carbon).
- SCN⁻: Ambidentate (can bind through sulfur or nitrogen).
- NO₂⁻: Ambidentate (can bind through nitrogen or oxygen).

5. **Count the Ligands that are Both Monodentate and Ambidentate:**
- From the analysis, the ligands that are both monodentate and ambidentate are:
- CN⁻
- OCN⁻
- SCN⁻
- Therefore, the total count is **3 ligands**.

### Final Answer:
The number of ligands which are monodentate as well as ambidentate is **3**.