How many of these elements have more first ionization energy then boron `Li, Be, C, N, O, F, Ne`

Answer

To determine how many elements have a first ionization energy greater than that of boron from the list `Li, Be, C, N, O, F, Ne`, we will analyze the ionization energies of each element.

### Step-by-Step Solution:

1. **Understanding Ionization Energy**:
Ionization energy is the energy required to remove the most loosely bound electron from an isolated gaseous atom. Generally, ionization energy increases across a period from left to right due to increasing nuclear charge and decreasing atomic size.

2. **Identify the Elements**:
The elements given are: Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), and Neon (Ne).

3. **List the Electronic Configurations**:
- Li: 1s² 2s¹
- Be: 1s² 2s²
- B: 1s² 2s² 2p¹
- C: 1s² 2s² 2p²
- N: 1s² 2s² 2p³
- O: 1s² 2s² 2p⁴
- F: 1s² 2s² 2p⁵
- Ne: 1s² 2s² 2p⁶

4. **Analyze Ionization Energies**:
- **Li**: Lower than B
- **Be**: Higher than B (due to fully filled 2s subshell)
- **B**: Reference point
- **C**: Higher than B
- **N**: Higher than B (half-filled stability)
- **O**: Higher than B
- **F**: Higher than B
- **Ne**: Higher than B (fully filled)

5. **Count Elements with Higher Ionization Energy**:
- Be: Yes
- C: Yes
- N: Yes
- O: Yes
- F: Yes
- Ne: Yes

The elements that have a first ionization energy greater than boron are: Be, C, N, O, F, and Ne.

6. **Total Count**:
There are a total of 6 elements that have a first ionization energy greater than that of boron.

### Final Answer:
**6 elements have a first ionization energy greater than boron.**

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