Out of `sigma _(2s), pi_(2_(p_(x))), pi_(2_(p_(z)))^(**)`
the gerde molecular orbital (s) is (are) …………. Whereas
ungerde molecular orbital (s) is (are) …………

Explanation

To determine which molecular orbitals are gerade and which are ungerade, we need to analyze the symmetry properties of the given molecular orbitals: σ_(2s), π_(2p_x), and π*_(2p_z).

### Step-by-Step Solution:

1. **Identify the Molecular Orbitals**:
- We have three molecular orbitals to consider:
- σ_(2s)
- π_(2p_x)
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