The shielding effect _ from left to right in a period:
Correct answer: C. Remains same
- A. Decreases
- B. Increases
- C. Remains same
- D. First increases then decreases
Explanation
In a period of the periodic table, the number of inner electron shells remains the same, while the nuclear charge (the number of protons in the nucleus) increases from left to right. As you move from left to right across a period, the shielding effect remains the same because the number of inner electron shells doesn't change. However, the increase in nuclear charge leads to a stronger attractive force on the outermost electrons, which makes it harder for them to move away from the nucleus. This results in an increase in ionization energy and a decrease in atomic radius from left to right in a period.
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