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Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.
Assertion: The mass number of hydrogen is equal to its atomic number
Reason: H− atom has no neutrons.
- a)Both assertion and reason are correct and reason is the correct explanation of the assertion.
- b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.
- c)Assertion is correct but reason is not correct.
- d)Assertion is incorrect, but reason is correct.
Correct answer is option 'A'. Can you explain this answer?
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Direction: In the following questions, a statement of Assertion (A) f...
For a chemical element the number of protons found in its nucleus is known as its atomic number. Atomic number is unique for each and every element so it is considered as the basis of the periodic table formation. Earlier mass numbers were considered but due to some irregularities it was dismissed.
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The nucleus of an atom consists of neutrons and protons. And the whole mass of the atom is decided on the basis of the mass of the nucleus because the mass of electrons present outside the nucleus is very negligible as compared to mass of protons and neutrons.
So the formula to calculate mass number is as follows:
Mass number = Number of protons + Number of neutrons
And for a hydrogen atom which is represented as 
the atomic number is one and the mass number is also one therefore both are equal. And we know that the number of protons is equal to the atomic number, therefore the number of protons is also one.
the atomic number is one and the mass number is also one therefore both are equal. And we know that the number of protons is equal to the atomic number, therefore the number of protons is also one.By putting the values in the above formula we get:
Number of neutrons = 1 - 1 = 0
Hence the number of neutrons present in the hydrogen atom is also zero.
So from the above discussions we can say that Assertion i.e. the mass number of hydrogen is equal to the atomic number is correct. And the Reason i.e. hydrogen atoms have no neutrons is also correct and reason is the correct explanation for assertion.
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Direction: In the following questions, a statement of Assertion (A) f...
Assertion: The mass number of hydrogen is equal to its atomic number
- The atomic number of an element represents the number of protons in the nucleus of an atom.
- In the case of hydrogen, the atomic number is 1, indicating that there is one proton in the nucleus.
Reason: H− atom has no neutrons
- The mass number of an atom is the sum of the number of protons and neutrons in the nucleus.
- Since hydrogen has an atomic number of 1 and no mention of any neutrons in the reason, it implies that hydrogen has no neutrons.
- Therefore, the mass number of hydrogen, which is the sum of protons and neutrons, is equal to its atomic number (1).
Explanation:
The given assertion and reason are both correct in this case. The atomic number of hydrogen is indeed 1, and hydrogen does not have any neutrons in its nucleus. Since the mass number of an element is the sum of protons and neutrons, and in the case of hydrogen, there are no neutrons, the mass number is equal to the atomic number. Therefore, option A is the correct choice, as both the assertion and reason are correct, and the reason explains why the assertion is true.
- The atomic number of an element represents the number of protons in the nucleus of an atom.
- In the case of hydrogen, the atomic number is 1, indicating that there is one proton in the nucleus.
Reason: H− atom has no neutrons
- The mass number of an atom is the sum of the number of protons and neutrons in the nucleus.
- Since hydrogen has an atomic number of 1 and no mention of any neutrons in the reason, it implies that hydrogen has no neutrons.
- Therefore, the mass number of hydrogen, which is the sum of protons and neutrons, is equal to its atomic number (1).
Explanation:
The given assertion and reason are both correct in this case. The atomic number of hydrogen is indeed 1, and hydrogen does not have any neutrons in its nucleus. Since the mass number of an element is the sum of protons and neutrons, and in the case of hydrogen, there are no neutrons, the mass number is equal to the atomic number. Therefore, option A is the correct choice, as both the assertion and reason are correct, and the reason explains why the assertion is true.
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Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer?
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Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. 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 Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. 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 Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer?.
Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. 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 Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. 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 Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
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Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.Assertion: The mass number of hydrogen is equal to its atomic numberReason: H− atom has no neutrons.a)Both assertion and reason are correct and reason is the correct explanation of the assertion.b)Both assertion and reason are correct, but reason is not the correct explanation for assertion.c)Assertion is correct but reason is not correct.d)Assertion is incorrect, but reason is correct.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 11 tests.
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