Q.Compare the ionization enthalpies of first series of the transition elements.

Step 1. State the overall level: 3d-series ionization enthalpies sit intermediate between the low values of s-block metals and the higher values of p-block elements.

Step 2. State the overall trend: moving left to right across the series, ionization enthalpy increases, broadly reflecting the rising nuclear charge.

Step 3. Note the irregularity: this increase is NOT smooth, because the added electron at each step enters the (n-1)d orbital, which only partially (and non-uniformly) shields the valence ns electrons -- so element-to-element values vary depending on how close that element's configuration sits to a half-filled or fully-filled state. …

State the overall intermediate level and rising trend of 3d ionization enthalpies, then highlight the chromium-low/zinc-high irreg …

• Describing the trend as perfectly smooth/monotonic without noting the specific Cr and Zn anomalies that the chapter its …