He is an inert gas. True (T) or False (F)

Explanation

**Step-by-Step Solution:**

1. **Identify the Element**: The question refers to "He," which is the chemical symbol for helium.

2. **Determine the Group**: Helium belongs to Group 18 of the periodic table, which is known as the noble gases or inert gases.

3. **Check the Atomic Number**: The atomic number of helium is 2. This means it has two protons in its nucleus.

4. **Examine the Electronic Configuration**: The electronic configuration of helium is 1s². This indicates that its first energy level (the s subshell) is fully occupied with two electrons.

5. **Understand Inertness**: An inert gas is characterized by its lack of reactivity due to having a complete outer electron shell. Since helium has a completely filled s orbital (1s²), it does not tend to gain or lose electrons.

6. **Conclude the Statement**: Since helium is a noble gas with a complete electron configuration, it is indeed unreactive or least reactive. Therefore, the statement "Helium is an inert gas" is true.

7. **Final Answer**: True (T).

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