Choose the correct options.

Options

A. (a) Isotopes have same number of atomic number
B. (b) Isobars have same atomic weight
C. (c) Isotones have same number of neutrons
D. (d) In neutral isotope atoms number of electrons are same

Answer

To solve the question, we need to analyze each statement regarding isotopes, isobars, isotones, and neutral isotopes to determine which options are correct.

### Step-by-Step Solution:

1. **Understanding Isotopes**:
- Isotopes are defined as atoms of the same element that have the same atomic number (number of protons) but different atomic mass numbers (number of neutrons).
- Example: Hydrogen has three isotopes: Protium (1H), Deuterium (2H), and Tritium (3H). All have the same atomic number (1) but different mass numbers (1, 2, and 3 respectively).
- **Conclusion**: The statement "isotopes have the same atomic number" is **correct**.

2. **Understanding Isobars**:
- Isobars are defined as atoms of different elements that have the same atomic mass number but different atomic numbers.
- Example: Argon (atomic number 18, mass number 40) and Potassium (atomic number 19, mass number 40) are isobars.
- **Conclusion**: The statement "isobars have the same atomic weight" is **correct**.

3. **Understanding Isotones**:
- Isotones are defined as atoms that have the same number of neutrons but different numbers of protons.
- Example: Sodium (atomic number 11, mass number 23) and Magnesium (atomic number 12, mass number 24) both have 12 neutrons (23-11=12 and 24-12=12).
- **Conclusion**: The statement "isotones have the same number of neutrons" is **correct**.

4. **Understanding Neutral Isotope Atoms**:
- Neutral atoms have the same number of protons and electrons, which means they are electrically neutral.
- Since isotopes are variants of the same element, they will have the same number of electrons in their neutral forms.
- **Conclusion**: The statement "in neutral isotope atoms, the number of electrons are the same" is **correct**.

### Final Conclusion:
All four statements are correct:
1. Isotopes have the same atomic number.
2. Isobars have the same atomic weight.
3. Isotones have the same number of neutrons.
4. In neutral isotope atoms, the number of electrons are the same.