The number of core electrons remains the same as we move from left to right across the periodic table, but the number of protons in the nucleus and the number of electrons in the outer valence shell increases. Which of the following best accompanies this trend in the periodic table?
- A decrease in ionization energy and an increase in atomic radii
- A decrease in atomic radii and a decrease in ionization energy
- An increase in ionization energy and a decrease in atomic radii
- An increase in ionization energy and an increase in atomic radii
Click for Explanation
This question tests the examinee’s knowledge of trends within the periodic table. In general, as you move from left to right across a row in the periodic table, electronegativity and ionization energy increases while atomic radii decrease. Therefore, C is the correct answer.
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