If the electronic configuration of an element A is 2, 6, then it is most likely to form which molecule, a diatomic molecule `(A_2)` or a triatomic molecule `(A_3)`?

Explanation

To determine whether element A, with an electronic configuration of 2, 6, is likely to form a diatomic molecule (A₂) or a triatomic molecule (A₃), we can analyze its valence electrons and bonding behavior.

### Step-by-Step Solution:

1. **Identify the Valence Electrons**:
- The electronic configuration of element A is 2, 6. This means it has 2 electrons in its first shell and 6 electrons in its second shell.
- The valence electrons are those in the outermost shell, which in this case is 6.

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