The species Ar,K⁺ and Ca²⁺ contain the same number of electrons.

⇦

⇨

The species Ar,K⁺ and Ca²⁺ contain the same number of electrons.In which order do their radii increase

Options

(a) Ca²⁺ < Ar < K⁺
(b) Ca²⁺ < K⁺ < Ar
(c) K⁺ < Ar < Ca²⁺
(d) Ar < K⁺ < Ca²⁺

Correct Answer:

Ca²⁺ < K⁺ < Ar

Explanation:

In isoelectronic species the radius decrease with increase in nuclear charge hence increasing order of radius is Ca⁺² < K⁺< Ar

Related Questions:

1. The following composition is known as “Bordeaux mixture”.
2. When an acid cell is charged, then
3. The screening effect of d-electrons is
4. A mixture of champhor and benzoic acid can be separated by
5. What is the oxidation state of P in Ba(H₂PO₂)₂

Topics: Classification of Elements and Periodicity (94)
Subject: Chemistry (2512)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends