Which group of the long form of the periodic table contains solid, liquid and gaseous elements?

Options

A. Group-13
B. Group-15
C. Group-12
D. Group-17

Answer

To determine which group of the long form of the periodic table contains solid, liquid, and gaseous elements, we can analyze the elements in different groups.

### Step-by-Step Solution:

1. **Identify the Groups in the Periodic Table**:
- The long form of the periodic table consists of several groups (columns), each containing elements with similar properties.

2. **Examine Group 17 (Halogens)**:
- Group 17, also known as the halogens, includes the elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

3. **Determine the States of Matter for Each Element**:
- **Fluorine (F)**: Exists as a gas at room temperature.
- **Chlorine (Cl)**: Also exists as a gas at room temperature.
- **Bromine (Br)**: Exists as a liquid at room temperature.
- **Iodine (I)**: Exists as a solid at room temperature.
- **Astatine (At)**: Although it is radioactive and less commonly encountered, it is expected to be a solid under standard conditions.

4. **Conclusion**:
- Group 17 contains elements in all three states of matter: solid (iodine, astatine), liquid (bromine), and gas (fluorine, chlorine). Therefore, the answer to the question is Group 17.

### Final Answer:
**Group 17 (Halogens) contains solid, liquid, and gaseous elements.**

---