Pauling.s electronegativity scale is based on experimental value of:-

Options

A. atomic radii
B. bond energies
C. bond lengths
D. electron affinity

Answer

To solve the question regarding Pauling's electronegativity scale, we will follow these steps:

### Step 1: Understand Electronegativity
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. Different elements have different electronegativities, which can affect how they bond with other elements.

**Hint:** Remember that electronegativity is related to how strongly an atom can attract electrons in a bond.

### Step 2: Identify Pauling's Contribution
Linus Pauling developed a scale to quantify electronegativity. His scale is based on the concept of bond energies, which are the energies required to break bonds between atoms.

**Hint:** Think about how bond strength relates to the ability of an atom to attract electrons.

### Step 3: Analyze the Options
The question provides four options:
1. Atomic radii
2. Bond energies
3. Bond lengths
4. Electroaffinity

Among these, we need to determine which one Pauling's electronegativity scale is based on.

**Hint:** Consider which of these options directly relates to the energy changes involved when bonds are formed or broken.

### Step 4: Focus on Bond Energies
Pauling's electronegativity scale specifically uses bond energies to establish a quantitative measure of electronegativity. The formula he proposed involves the bond energies of the two atoms involved in the bond.

**Hint:** Recall that bond energies indicate how strong a bond is, which is crucial for determining how much an atom can attract electrons.

### Step 5: Conclusion
Based on the analysis, the correct answer is:
**Bond Energies (Option 2)**

**Final Answer:** Pauling's electronegativity scale is based on experimental values of bond energies.

---