Class 9 Exam > Class 9 Questions > Which of the following is correct about atom?...
Start Learning for Free
Which of the following is correct about atom?
A. It is the smallest unit of matter
B. Size of atom is very large as compared to the nucleus of the atom
C. In an atom number of protons is equal to number of electrons
D. Atoms are stable
A. It is the smallest unit of matter
B. Size of atom is very large as compared to the nucleus of the atom
C. In an atom number of protons is equal to number of electrons
D. Atoms are stable
- a)(a) and (b) are correct
- b)(a) and (c) are correct
- c)(c) and (d) are correct
- d)(a), (b) and (c) are correct
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Which of the following is correct about atom?A. It is the smallest uni...
The nucleus is made up of protons and, in most cases, neutrons. An atomic nucleus is much, much smaller than an atom. The cloud of electrons that "orbit" the nucleus and define the "size" of an atom is roughly 100,000 times as large as that atom's nucleus.
Free Test
FREE
| Start Free Test |
Community Answer
Which of the following is correct about atom?A. It is the smallest uni...
Explanation:
The correct answer is option B: (a) and (c) are correct.
Size of atom is very large as compared to the nucleus of the atom:
- The size of an atom is much larger than the size of its nucleus.
- The nucleus of an atom is located at the center and contains protons and neutrons.
- The electrons revolve around the nucleus in different energy levels or shells.
- The size of an atom is determined by the outermost shell where the electrons are located.
- The size of the nucleus is extremely small compared to the overall size of the atom.
In an atom, the number of protons is equal to the number of electrons:
- An atom is electrically neutral, which means it has an equal number of positive protons and negative electrons.
- Protons have a positive charge, while electrons have a negative charge.
- The number of protons in an atom is called the atomic number, and it determines the element.
- The number of electrons in a neutral atom is equal to the atomic number.
Atoms are stable:
- Atoms strive to achieve stability by having a complete outermost energy level.
- This stability is achieved by either gaining, losing, or sharing electrons with other atoms.
- When atoms gain or lose electrons, they become ions and may have a positive or negative charge.
- Atoms can also form covalent bonds by sharing electrons with other atoms.
- Stable atoms have a full outermost energy level, which makes them less reactive.
Therefore, options (a) and (c) are correct. The size of an atom is much larger than the nucleus, and in an atom, the number of protons is equal to the number of electrons. Option (b) is incorrect because atoms are not always stable and can gain or lose electrons to achieve stability. Option (d) is incorrect because not all of the statements are correct.
The correct answer is option B: (a) and (c) are correct.
Size of atom is very large as compared to the nucleus of the atom:
- The size of an atom is much larger than the size of its nucleus.
- The nucleus of an atom is located at the center and contains protons and neutrons.
- The electrons revolve around the nucleus in different energy levels or shells.
- The size of an atom is determined by the outermost shell where the electrons are located.
- The size of the nucleus is extremely small compared to the overall size of the atom.
In an atom, the number of protons is equal to the number of electrons:
- An atom is electrically neutral, which means it has an equal number of positive protons and negative electrons.
- Protons have a positive charge, while electrons have a negative charge.
- The number of protons in an atom is called the atomic number, and it determines the element.
- The number of electrons in a neutral atom is equal to the atomic number.
Atoms are stable:
- Atoms strive to achieve stability by having a complete outermost energy level.
- This stability is achieved by either gaining, losing, or sharing electrons with other atoms.
- When atoms gain or lose electrons, they become ions and may have a positive or negative charge.
- Atoms can also form covalent bonds by sharing electrons with other atoms.
- Stable atoms have a full outermost energy level, which makes them less reactive.
Therefore, options (a) and (c) are correct. The size of an atom is much larger than the nucleus, and in an atom, the number of protons is equal to the number of electrons. Option (b) is incorrect because atoms are not always stable and can gain or lose electrons to achieve stability. Option (d) is incorrect because not all of the statements are correct.
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer?
Question Description
Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? for Class 9 2024 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 atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer?.
Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? for Class 9 2024 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 atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following is correct about atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect 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 atom?A. It is the smallest unit of matterB. Size of atom is very large as compared to the nucleus of the atomC. In an atom number of protons is equal to number of electronsD. Atoms are stablea)(a) and (b) are correctb)(a) and (c) are correctc)(c) and (d) are correctd)(a), (b) and (c) are correctCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
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