Which of the following is not different for an atoms and its corresponding ion ?

Options

A. Number of electrons
B. nuclear charges
C. propterties
D. size

Explanation

To solve the question "Which of the following is not different for an atom and its corresponding ion?", we will analyze the properties of an atom and its ion step by step.

### Step 1: Understand the Definitions
- **Atom**: A basic unit of matter, consisting of protons, neutrons, and electrons.
- **Ion**: An atom that has gained or lost one or more electrons, resulting in a net charge.

### Step 2: Identify the Properties to Compare
We need to compare the following properties:
1. Number of Electrons
2. Nuclear Charge
3. Chemical Properties
4. Size of the Atom/Ion

### Step 3: Analyze Each Property
1. **Number of Electrons**:
- An atom has a specific number of electrons equal to its atomic number.
- An ion will have a different number of electrons than its corresponding atom. For example, a hydrogen atom (H) has 1 electron, while the hydrogen ion (H-) has 2 electrons.
- **Conclusion**: This property is different.

2. **Nuclear Charge**:
- Nuclear charge is defined as the total charge of the nucleus, which is determined by the number of protons.
- For hydrogen, both the atom and the ion have 1 proton, hence the nuclear charge remains the same.
- **Conclusion**: This property is not different.

3. **Chemical Properties**:
- The chemical properties of an atom and its ion can vary significantly. For instance, an atom may be neutral while its ion may have a tendency to gain or lose electrons.
- **Conclusion**: This property is different.

4. **Size of the Atom/Ion**:
- The size of an ion can differ from its corresponding atom. Anions (negatively charged ions) are generally larger than their neutral atoms due to increased electron-electron repulsion.
- **Conclusion**: This property is different.

### Step 4: Final Conclusion
The only property that does not differ between an atom and its corresponding ion is the **nuclear charge**.

### Answer: Nuclear Charge

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