Which of the following contains both ionic and covalent bonding?

Options

A. NaBr
B. `Ba(CN)_(2)`
C. `PCl_(5)`
D. `CH_(3)CH_(2)OH`

Explanation

To determine which of the given compounds contains both ionic and covalent bonding, we will analyze each option step by step.

### Step 1: Understand Ionic and Covalent Bonds
- **Ionic Bond**: Formed when one atom transfers electrons to another, resulting in the formation of positively and negatively charged ions.
- **Covalent Bond**: Formed when two atoms share electrons.

### Step 2: Analyze Each Option

1. **NaBr (Sodium Bromide)**
- Sodium (Na) forms a positive ion (Na⁺) and Bromine (Br) forms a negative ion (Br⁻).
- This compound is formed entirely through ionic bonding.
- **Conclusion**: NaBr contains only ionic bonding.

2. **Ba(CN)₂ (Barium Cyanide)**
- Barium (Ba) forms a positive ion (Ba²⁺).
- The cyanide ion (CN⁻) consists of carbon (C) and nitrogen (N) atoms, which are covalently bonded (C≡N).
- Therefore, Ba(CN)₂ contains both ionic bonding (between Ba²⁺ and CN⁻) and covalent bonding (within the CN⁻ ion).
- **Conclusion**: Ba(CN)₂ contains both ionic and covalent bonding.

3. **PCl₅ (Phosphorus Pentachloride)**
- Phosphorus (P) and Chlorine (Cl) are both nonmetals.
- They share electrons to form covalent bonds.
- **Conclusion**: PCl₅ contains only covalent bonding.

4. **CH₃CH₂OH (Ethanol)**
- This molecule consists of carbon (C), hydrogen (H), and oxygen (O) atoms.
- The bonds formed here are covalent bonds due to the sharing of electrons.
- **Conclusion**: CH₃CH₂OH contains only covalent bonding.

### Final Conclusion
- The only compound that contains both ionic and covalent bonding is **Ba(CN)₂**.

### Answer: Ba(CN)₂ contains both ionic and covalent bonding.

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