What is true for cations?

Options

A. negatively charged ions
B. move towards anode
C. positively charged ions
D. present in oxygen

Answer

### Step-by-Step Solution:

1. **Definition of Cations**:
- Cations are defined as positively charged ions. They are formed when a neutral atom loses one or more electrons.

2. **Formation of Cations**:
- For example, consider a sodium atom (Na). When it loses one electron, it becomes a sodium cation (Na⁺). The reaction can be represented as:
\[ \text{Na} \rightarrow \text{Na}^+ + e^- \]
- Here, Na is the neutral sodium atom, and Na⁺ is the cation formed after losing an electron.

3. **Movement of Cations**:
- Since cations are positively charged, they are attracted to the negative electrode in an electrochemical cell, which is called the cathode. This is because opposite charges attract.

4. **Conclusion**:
- Based on the definition and characteristics of cations, the correct statement is that cations are positively charged ions.

### Final Answer:
The true statement about cations is that they are **positively charged ions**.

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