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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?
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In the following question a statement of Assertion (A) followed by a ...
Atomic size generally decreases along a period
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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.
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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.
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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?
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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?.
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