NEET Exam  >  NEET Questions  >  Assertion (A) : The isotopes are the atoms of... Start Learning for Free
Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.
Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.
  • a)
    Both A and R true and R is the correct explanation of A
  • b)
    Both A and R are true but R is not a correct explanation of A
  • c)
    A is true but R is false
  • d)
    A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Assertion (A) : The isotopes are the atoms of the same element with di...
A is false but R is true
Explanation: The isotopes are indeed atoms of the same element with different atomic masses due to different numbers of neutrons. However, they do not require different positions in the periodic table. Isotopes of the same element share the same chemical properties and thus occupy the same position in the periodic table. The atomic number, which determines an element's place in the periodic table, remains the same for all isotopes of a given element.
Free Test
Community Answer
Assertion (A) : The isotopes are the atoms of the same element with di...
Assertion (A): The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.
Reason (R): Variable number of neutrons in the nuclei of the atoms of the same elements leads to different atomic masses.

Explanation:
Isotopes refer to atoms of the same element that have different atomic masses. These isotopes have the same number of protons but different numbers of neutrons in their nuclei. Therefore, the reason for their different atomic masses is the variable number of neutrons present in their nuclei.

The atomic mass of an element is determined by the sum of the masses of its protons, neutrons, and electrons. Since isotopes have different numbers of neutrons, their total mass will vary, leading to different atomic masses.

Rebuttal:
The assertion states that isotopes require different positions in the periodic table. However, this is not true. The periodic table is organized based on the atomic number of elements, which is the number of protons in their nuclei. Isotopes of the same element have the same number of protons, so they are placed in the same position in the periodic table.

Conclusion:
Therefore, assertion (A) is false as isotopes of the same element have different atomic masses due to a variable number of neutrons, but they do not require different positions in the periodic table. The reason (R) is true as the variable number of neutrons leads to different atomic masses. Hence, the correct answer is option 'D'.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Similar NEET Doubts

Top Courses for NEET

Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?
Question Description
Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Assertion (A) : The isotopes are the atoms of the same element with different atomic masses. They require different positions in the periodic table.Reason (R) : Variable number of neutrons in the nuclei of the atoms of same elements leads to the different atomic masses.a)Both A and R true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev