Lewis introduced simple notations to represent valence electrons in an atom called

Options

A. Lewis symbols
B. Lewis element
C. Lewis molecule
D. Lewis structure

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the notations introduced by Lewis to represent valence electrons in an atom.

2. **Identifying the Concept**: The notations introduced by Lewis are known as "Lewis symbols." These symbols are used to depict the valence electrons of an atom.

3. **Explaining Lewis Symbols**: Lewis symbols consist of the chemical symbol of an element surrounded by dots. Each dot represents a valence electron. For example, the Lewis symbol for lithium (Li) has one dot, indicating it has one valence electron.

4. **Examples of Lewis Symbols**:
- Lithium (Li): •Li (1 dot for 1 valence electron)
- Beryllium (Be): ••Be (2 dots for 2 valence electrons)
- Boron (B): •••B (3 dots for 3 valence electrons)
- Carbon (C): ••••C (4 dots for 4 valence electrons)

5. **Conclusion**: The notation introduced by Lewis to represent valence electrons is called "Lewis symbols."

**Final Answer**: Lewis symbols.

---