A decrease in atomic size and an increase in nuclear charge across a period lead to
- an increase in the tendency to lose electron
- an increase in chemical reactivity
-
a decrease in electropositivity
- a decrease in covalency in bond formation
The correct answer is: C
Explanation
As you move across a period from left to right, the increase in nuclear charge (due to the addition of protons) results in a stronger attraction that causes the atomic size to diminish. Additionally, this trend also affects other properties, such as ionization energy and electronegativity, which generally increase across a period as the atomic size decreases. This leads to a decrease in electropositivity across the period.