In which of the following statement concerning elements with
atomic number 10 is false ?

Options

A. Element is monoatomic
B. If has a almost zero electron affinity
C. If forms a convalent network solid
D. None of these

Answer

To determine which statement concerning elements with atomic number 10 (which is Neon) is false, we will analyze the statements one by one.

### Step-by-Step Solution:

1. **Identify the Element**:
- The element with atomic number 10 is Neon (Ne).
- Neon is a noble gas.

**Hint**: Remember that atomic number corresponds to the number of protons in an atom, which identifies the element.

2. **Electron Configuration**:
- Neon has the electron configuration of 1s² 2s² 2p⁶, which can also be represented as 2-8.
- This indicates that Neon has a complete outer shell (octet).

**Hint**: Noble gases have full outer electron shells, which is key to their chemical properties.

3. **Inert Nature**:
- Noble gases, including Neon, are known for being inert due to their complete octet.
- They do not readily gain or lose electrons and do not form chemical bonds.

**Hint**: Inertness is a characteristic of noble gases due to their stable electron configuration.

4. **Electron Affinity**:
- Neon has almost zero electron affinity because there is no tendency to gain an additional electron; there is no available space in the valence shell.
- This means that the energy required to add an electron is effectively zero.

**Hint**: Electron affinity is the energy change when an electron is added to an atom; noble gases have little to no affinity due to their filled valence shells.

5. **Covalent Network Solid Formation**:
- The statement that Neon forms a covalent network solid is false.
- Neon is monoatomic and exists as a gas at room temperature, not as a solid or a covalent network.

**Hint**: Consider the physical state of noble gases; they do not form solids under normal conditions.

6. **Conclusion**:
- The false statement concerning elements with atomic number 10 (Neon) is that it forms a covalent network solid.

### Final Answer:
The false statement is: "It forms a covalent network solid."