Which of the following properties shows a gradual decrease with an increase in atomic number across a period in the periodic table?

Size of the atoms decreases across the period as the electrons are added in the same principal quantum number which results in the increase the effective nuclear charge on the electrons causing the atomic size to decrease accordingly. Electron affinity, ionization enthalpy, and electronegativity increases across the period because of the decrease in size, increase in the effective nuclear charge on electrons, and an increase in non-metallic character. Assertion-Reason While answering these questions, you are required to choose any one of the following four responses. (A) If both Assertion and