Which of the following properties generally increases across a period (left to right) in the periodic table?

Correct option is B

The correct answer is (b) Ionisation enthalpy
Explanation:
• Effective nuclear charge increases across a period.
• Atomic size decreases from left to right.
• Higher energy required to remove electrons.
Information Booster:
• Ionisation enthalpy measured in kJ/mol.
• Non-metals show higher ionisation enthalpy.
Additional Knowledge (Incorrect Options):
(a) Atomic radius
• Decreases across a period.
(c) Reduction
• Chemical tendency, not periodic property.
(d) Metallic character
• Decreases across a period.