Q26. Which of the following pairs represents isoelectronic ions?
- ANa+, K+
- BK, Mg²+
- CMg²+,Ca²+
- DCa²+, S²
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Answer: D) Ca²+, S²
Isotopes, Isobars, and Isotones
29 MCQ questions with answers and explanations · page 2 of 2
Test yourself▶ 25 question test
Q27. ¹⁸Ar⁴⁰, ¹⁹K ⁴⁰ and ²⁰ Ca ⁴⁰ are_
- Aisoelectronic
- Bisothermal
- CSamnetronic
- DIsotopic
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Answer: B) isothermal
Q28. Isobars are produced by the emission of which of the following?
- Aalpha rays
- Bbeta rays
- CGamma rays
- DX-rays
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Answer: B) beta rays
Q29. Isotopes have _______ 1. Similar physical properties and different chemical properties. 2. Different physical properties. 3. Similar chemical properties Code:
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3 all
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Answer: C) 2 and 3 only