The number of atoms involved in bridged bonds in one diborane molecule is

Options

A. 4
B. 2
C. 6
D. 5

Answer

To determine the number of atoms involved in bridged bonds in one diborane (B2H6) molecule, we can follow these steps:

### Step 1: Understand the Structure of Diborane
Diborane (B2H6) consists of two boron atoms and six hydrogen atoms. The structure is unique because it contains both terminal and bridge hydrogens.

**Hint:** Remember that diborane has a specific molecular geometry that includes both terminal and bridge hydrogen atoms.

### Step 2: Identify Terminal and Bridge Hydrogens
In diborane:
- There are **four terminal hydrogen atoms** that are bonded directly to the boron atoms.
- There are **two bridge hydrogen atoms** that connect the two boron atoms.

**Hint:** Focus on the distinction between terminal and bridge hydrogens in the molecular structure.

### Step 3: Analyze the Bridged Bonds
The bridged bonds in diborane involve the two boron atoms and the two bridge hydrogen atoms. Each bridge bond can be described as a three-center two-electron bond, where the two boron atoms and the two bridge hydrogens participate.

**Hint:** Consider how many atoms are involved in the bridge bonds specifically, which includes the two boron atoms and the two bridge hydrogen atoms.

### Step 4: Count the Atoms Involved in Bridged Bonds
The total number of atoms involved in the bridged bonds is:
- 2 Boron atoms
- 2 Bridge Hydrogen atoms

Thus, the total is:
\[ 2 \text{ (Boron)} + 2 \text{ (Bridge Hydrogen)} = 4 \text{ atoms} \]

**Hint:** Ensure you account for all atoms that are part of the bridge bonds when making your final count.

### Conclusion
The number of atoms involved in bridged bonds in one diborane molecule is **4**.

**Final Answer:** 4 atoms.