Answer:
Phosphorus
Step-by-step explanation:
Phosphorus will have higher ionization energy than silicon from the given choices.
Ionization energy is the energy required to remove the most loosely held electron in an atom.
Based on the periodic trends:
- Across the period, ionization energy increases from left to right
- Down a group, ionization energy decreases.
Since phosphorus is the element in the right most part after silicon, it has higher ionization energy