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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?
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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.
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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'.
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Read the passage given below and answer the following questions:The transition metals when exposed to oxygen at low and intermediate temperatures form thin, protective oxide films of up to some thousands of Angstroms in thickness. Transition metal oxides lie between the extremes of ionic and covalent binary compounds formed by elements from the left or right side of the periodic table. They range from metallic to semiconducting and deviate by both large and small degrees from stoichiometry. Since d-electron bonding levels are involved, the cations-exist in various valence states and hence give rise to a large number of oxides. The crystal structures are often classified by considering a cubic or hexagonal close-packed lattice of one set of ions with the other set of ions filling the octahedral or tetrahedral interstices. The actual oxide structures, however, generally show departures from such regular arrays due in part to distortions caused by packing of ions of different size and to ligand field effects. These distortions depend not only on the number of d-electrons but also on the valence and the position of the transition metal in a period or group.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

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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?
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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?.
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