JAMB Chemistry 2010 Objective — Question 6
Question 6 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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Moving from left to right across a period, the general rise in the first ionization energy can be attributed to the
- A. decrease in screening effect
- B. increase in screening effect
- C. decrease in nuclear charge
- D. increase in nuclear chargeCorrect
Explanation
Across a period, the number of protons (nuclear charge) increases while shielding stays roughly constant, so the increase in nuclear charge causes ionization energy to rise.
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