Which of the following ions has smaller ionic radius?
Correct answer: D. Ti4+
- A. K+
- B. Ca2+
- C. Ti3+
- D. Ti4+
Explanation
The ionic radius of an ion depends on the number of electrons and the charge of the ion. As the positive charge on an ion increases, the ion loses more electrons and the effective nuclear charge experienced by the remaining electrons increases, pulling them closer to the nucleus and resulting in a smaller ionic radius. Ti4+ has the highest positive charge among the given ions, having lost four electrons, and thus has the smallest ionic radius. In contrast, K+, Ca2+, and Ti3+ have fewer lost electrons and larger ionic radii.
Last updated
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.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2. Law of octaves was proposed by
7th period of the periodic table contains normal elements:
(A), (B) and (C) are elements in the third period. The oxide of(A) is ionic, that of (B) is amphoteric and that of (C) is a giant molecule (covalent network). (A), (B) and (C) have atomic numbers in the order:
(A), (B) and (C) are elements in the third short period. Oxide of (A) is ionic, that of (B) is amphoteric and of (C) a giant molecule. (A), (B) and (C) have atomic numbers in the order of:
A gas that reacts with CaO and not with NaHCO3 is: