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Which of the following is correct about an atom?
(a) It is the smallest unit of matter.
(b) Size of an atom is very large as compared to the size of nucleus of the atom.
(c) In an atom, the number of protons is equal to the number of electrons.
(d) Atoms are stable.
(a) It is the smallest unit of matter.
(b) Size of an atom is very large as compared to the size of nucleus of the atom.
(c) In an atom, the number of protons is equal to the number of electrons.
(d) Atoms are stable.
- a)(a) and (c) are correct
- b)(a), (b) and (c) are correct
- c)(a) and (b) are correct
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of the following is correct about an atom?(a) It is the smallest...
An atom is the smallest unit of matter. Size of an atom is very large as compared to the size of the nucleus of the atom. In an atom, the number of protons is equal to the number of electrons. Atoms are stable particles.
Most Upvoted Answer
Which of the following is correct about an atom?(a) It is the smallest...
Explanation:
Statement (a): It is the smallest unit of matter.
The statement (a) is correct. An atom is the smallest unit of matter that retains the properties of an element. Atoms are composed of subatomic particles such as protons, neutrons, and electrons.
Statement (b): Size of an atom is very large as compared to the size of the nucleus of the atom.
The statement (b) is incorrect. The size of an atom is actually very small compared to the size of its nucleus. The nucleus of an atom is located at its center and contains protons and neutrons. The electrons orbit around the nucleus in electron shells or energy levels. The size of an atom is determined by the outermost electron shell, while the size of the nucleus is much smaller.
Statement (c): In an atom, the number of protons is equal to the number of electrons.
The statement (c) is correct. In an atom, the number of protons is equal to the number of electrons. Protons have a positive charge, while electrons have a negative charge. The positive charge of the protons is balanced by the negative charge of the electrons, resulting in an overall neutral atom.
Statement (d): Atoms are stable.
The statement (d) is incorrect. Atoms can be stable or unstable depending on their arrangement of subatomic particles. Stable atoms have a balanced number of protons and electrons, while unstable atoms have an imbalance that can lead to radioactive decay or chemical reactions.
Conclusion:
From the given statements, (a) and (c) are correct, but (b) and (d) are incorrect. Therefore, the correct option is (a) and (c) are correct.
Statement (a): It is the smallest unit of matter.
The statement (a) is correct. An atom is the smallest unit of matter that retains the properties of an element. Atoms are composed of subatomic particles such as protons, neutrons, and electrons.
Statement (b): Size of an atom is very large as compared to the size of the nucleus of the atom.
The statement (b) is incorrect. The size of an atom is actually very small compared to the size of its nucleus. The nucleus of an atom is located at its center and contains protons and neutrons. The electrons orbit around the nucleus in electron shells or energy levels. The size of an atom is determined by the outermost electron shell, while the size of the nucleus is much smaller.
Statement (c): In an atom, the number of protons is equal to the number of electrons.
The statement (c) is correct. In an atom, the number of protons is equal to the number of electrons. Protons have a positive charge, while electrons have a negative charge. The positive charge of the protons is balanced by the negative charge of the electrons, resulting in an overall neutral atom.
Statement (d): Atoms are stable.
The statement (d) is incorrect. Atoms can be stable or unstable depending on their arrangement of subatomic particles. Stable atoms have a balanced number of protons and electrons, while unstable atoms have an imbalance that can lead to radioactive decay or chemical reactions.
Conclusion:
From the given statements, (a) and (c) are correct, but (b) and (d) are incorrect. Therefore, the correct option is (a) and (c) are correct.
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Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer?
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Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer?.
Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer?.
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Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following is correct about an atom?(a) It is the smallest unit of matter.(b) Size of an atom is very large as compared to the size of nucleus of the atom.(c) In an atom,thenumber of protons is equal to the number of electrons.(d) Atoms are stable.a)(a) and (c) are correctb)(a), (b) and (c) are correctc)(a) and (b) are correctd)All of theseCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 9 tests.
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