When two atoms shair one pair of electrons they are said to be joined by a

Options

A. single covalent bond
B. double covalent bond
C. triple covalent bond
D. none of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Electron Sharing**: When two atoms share electrons, they form a bond. The sharing of one pair of electrons specifically indicates a certain type of bond.

2. **Identifying the Type of Bond**: The bond formed by the sharing of one pair of electrons is known as a covalent bond. Covalent bonds can be classified based on the number of electron pairs shared between the atoms.

3. **Single Bond Formation**: When only one pair of electrons is shared, it is referred to as a single bond. This is the simplest form of covalent bonding.

4. **Example of a Single Bond**: A common example of a molecule with a single bond is ethane (C2H6). In ethane, each carbon atom shares one pair of electrons with another carbon atom, forming a single covalent bond.

5. **Sigma Bond**: The first bond formed between two atoms is always a sigma bond. This bond is characterized by the head-on overlap of atomic orbitals.

6. **Conclusion**: Therefore, when two atoms share one pair of electrons, they are said to be joined by a single covalent bond.

**Final Answer**: When two atoms share one pair of electrons, they are said to be joined by a **single covalent bond**.

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