Direction (Q. Nos. 1-11) This section contains 11multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.Which of the following is correct?a)1H1and2He3are isotopesb)6C14and7N14are isotopesc)19K39and20Ca40are isotonesd)9F19and11Na24are isodiaphersCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Because isotones means the same number of neutron,so, from the question, option c is right, number of neutron in k is,39-19= 20,and,the number of neutron in ca is also 40-20=20 so it is isotones, thats why option c is correct,

Answer

Isotones are those species which has same number of neutron we know that no. neutron +no.of proton =mass no. apply this logic

Answer

Isotones means having equal no. of neutrons. here K and Ca both have 20 neutrons....so they are isotones

Answer

Isotopes, Isotones, and Isodiaphers

Isotopes, isotones, and isodiaphers are terms used in nuclear chemistry to describe different types of atoms and their relationship to one another. Let's understand each of these terms and then determine which option is correct.

Isotopes:
- Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
- They have the same atomic number (number of protons) but different mass numbers (sum of protons and neutrons).
- Isotopes of an element exhibit similar chemical properties but may have slightly different physical properties due to their differing mass.
- Example: Hydrogen has three isotopes - protium (1H1), deuterium (1H2), and tritium (1H3).

Isotones:
- Isotones are atoms that have the same number of neutrons but different numbers of protons.
- They belong to different elements but have similar neutron-to-proton ratios.
- Isotones have different atomic numbers and different mass numbers.
- Example: Potassium-39 (19K39) and calcium-40 (20Ca40) are isotones because they have the same number of neutrons (20) but different numbers of protons (19 and 20, respectively).

Isodiaphers:
- Isodiaphers are atoms that have the same difference between the number of neutrons and protons.
- They belong to different elements and have different atomic numbers and mass numbers.
- Example: Fluorine-19 (9F19) and sodium-24 (11Na24) are isodiaphers because the difference between the number of neutrons and protons is the same (10) for both atoms.

Correct option:
Based on the explanations above, option c) 19K39 and 20Ca40 are isotones is the correct answer. The other options do not accurately represent the relationship between the given atoms.

Similar Class 11 Doubts

Multiple 2.2 and 0.225.Given answer correct to sinifican figure??

What are isodiaphers

Prove this :- 41^n - 14^n is a multiple of 27 ?

what is the meaning of following linesome of positively charged particles carry a multiple of the fundamental unit of electrical charge

What do you mean by isodiaphers?

Top Courses for Class 11View all

Chemistry Class 11

CUET Mock Test Series

English Class 11

Chemistry Practice Tests: CUET Preparation

CUET Mock Test: Humanities Subjects 2025

Top Courses for Class 11

Top Courses for Class 11

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams