Name two elemental forms of carbon.

Explanation

**Step-by-Step Solution:**

1. **Understanding Elemental Forms of Carbon**: Carbon exists in different forms, known as allotropes. The two most well-known elemental forms of carbon are graphite and diamond.

2. **Identifying Graphite**:
- Graphite is one of the crystalline forms of carbon.
- It is known for its ability to conduct electricity due to the mobility of electrons within its structure.
- Graphite is also characterized by its high melting point and is used in applications like pencils and lubricants.
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