Define octet rule. Write its significance and limitations.

Explanation

### Step-by-Step Solution

**Step 1: Define the Octet Rule**
The octet rule states that atoms tend to form bonds in such a way that they have eight electrons in their valence shell, achieving a stable electronic configuration similar to that of noble gases. This rule is primarily applicable to main group elements.

**Step 2: Significance of the Octet Rule**
The significance of the octet rule lies in its ability to explain the chemical bonding behavior of elements. It helps in understanding:
- The formation of ionic bonds, where electrons are transferred from one atom to another, resulting in the formation of positively and negatively charged ions.
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