The Particle Whip emits a tightly focused particle beam, which is used as the carrier for a single immensely powerful bolt of energy. Note that any model under the hole in the middle of the Ordnance template is hit with an AP1 attack. The particle whip is an Ordnance weapon.
Errata — Chapter Approved: Codex: Necrons Q&A (v2.0): Since the template scatters most of the time, it isn't possible to reliably snipe a specific model with the AP1 central hole. Casualties are also still chosen by the owning player as normal, so a character in the unit only has to be hit under the hole if every other model in the unit has already been wounded.