Which is correct order of ionization energy:
Correct answer: D. Both A and B
- A. Be > Mg > Ca
- B. Na > K > Rb
- C. Rb > K > Na
- D. Both A and B
Explanation
The correct answer is option D: Both A and B. Ionization energy decreases as you move down a group in the periodic table due to increased electron shielding and the greater distance of the outer electrons from the nucleus. This makes the electrons easier to remove. Therefore, the sequences Be > Mg > Ca and Na > K > Rb both correctly depict this trend. Option C is incorrect because it suggests an increase in ionization energy down the group, which is not consistent with the periodic trend.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Periodic Properties and Trends questions
The atomic masses of Li and K are 7 and 39, respectively. According to law of triads the atomic mass of Na will be:
The order of which the following oxides are arranged according to decreasing basic nature:
Choose correct statement:
The set representing the correct order of first ionization energy is:
Correct order of atomic radius is:
Which of the following sequence regarding the first ionization potential of coinage metal is correct?