Class 11 Exam > Class 11 Questions > In the following question a statement of Ass...
Start Learning for Free
In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.
Assertion (A): Atomic size increases along a period.
Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)Both A and R are false.
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
In the following question a statement of Assertion (A) followed by a ...
Atomic size generally decreases along a period
Most Upvoted Answer
In the following question a statement of Assertion (A) followed by a ...
Assertion (A): Atomic size increases along a period.
Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.
Explanation:
- The atomic size refers to the size of an atom, which is usually represented by its atomic radius. It is a measure of the distance from the nucleus to the outermost electron shell.
- The atomic size generally decreases from left to right across a period in the periodic table.
- The reason behind this trend is the increase in the effective nuclear charge as the atomic number increases.
- The effective nuclear charge is the net positive charge experienced by the outermost electrons in an atom. It is determined by subtracting the shielding effect of inner electrons from the total nuclear charge.
- As the atomic number increases along a period, the number of protons in the nucleus also increases. This results in a stronger positive charge in the nucleus, which attracts the electrons more strongly.
- The increased attraction of electrons to the nucleus leads to a decrease in the atomic size, as the electrons are pulled closer to the nucleus.
- Therefore, the statement of Reason (R) is correct as it provides a logical explanation for the assertion (A).
Conclusion:
- Both the statement of Assertion (A) and the statement of Reason (R) are true.
- The Reason (R) correctly explains why the atomic size increases along a period.
- Hence, the correct answer is option 'a' - Both A and R are true and R is the correct explanation of A.
Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.
Explanation:
- The atomic size refers to the size of an atom, which is usually represented by its atomic radius. It is a measure of the distance from the nucleus to the outermost electron shell.
- The atomic size generally decreases from left to right across a period in the periodic table.
- The reason behind this trend is the increase in the effective nuclear charge as the atomic number increases.
- The effective nuclear charge is the net positive charge experienced by the outermost electrons in an atom. It is determined by subtracting the shielding effect of inner electrons from the total nuclear charge.
- As the atomic number increases along a period, the number of protons in the nucleus also increases. This results in a stronger positive charge in the nucleus, which attracts the electrons more strongly.
- The increased attraction of electrons to the nucleus leads to a decrease in the atomic size, as the electrons are pulled closer to the nucleus.
- Therefore, the statement of Reason (R) is correct as it provides a logical explanation for the assertion (A).
Conclusion:
- Both the statement of Assertion (A) and the statement of Reason (R) are true.
- The Reason (R) correctly explains why the atomic size increases along a period.
- Hence, the correct answer is option 'a' - Both A and R are true and R is the correct explanation of A.
Free Test
| FREE | Start Free Test |
Community Answer
In the following question a statement of Assertion (A) followed by a ...
The correct answer should be option(B)
as assertion is talking about increase in atomic size. But reason is talking about decrease in atomic size.
as assertion is talking about increase in atomic size. But reason is talking about decrease in atomic size.
Attention Class 11 Students!
To make sure you are not studying endlessly, EduRev has designed Class 11 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 11.
|
Explore Courses for Class 11 exam
|
|
Similar Class 11 Doubts
Top Courses for Class 11View all
In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer?
Question Description
In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer?.
In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer?.
Solutions for In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.
Here you can find the meaning of In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.Assertion (A): Atomic size increases along a period.Reason (R): Effective nuclear charge increases as the atomic number increases resulting in the increased attraction of electrons to the nucleus.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)Both A and R are false.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 11 tests.
|
|
Explore Courses for Class 11 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup