Class 9 Exam > Class 9 Questions > The atomic number of sodium is 11 and its mas...
Start Learning for Free
The atomic number of sodium is 11 and its mass number is 23. It has
- a)11 neutrons and 12 protons
- b)12 protons and 11 electrons
- c)11 electrons and 12 neutrons
- d)12 electrons and 11 neutrons
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
The atomic number of sodium is 11 and its mass number is 23. It hasa)1...
The atomic number of an element represents the number of protons in its nucleus, while the mass number represents the total number of protons and neutrons.
In the case of sodium:
- Atomic number = 11, which means it has 11 protons.
- Mass number = 23, which means it has a total of 23 protons and neutrons.
To determine the number of neutrons and electrons in sodium, we can use the following formulas:
- Number of neutrons = Mass number - Atomic number
- Number of electrons = Atomic number
Using the formulas:
- Number of neutrons = 23 - 11 = 12
- Number of electrons = 11
Therefore, the correct answer is:
C:
11 electrons and 12 neutrons
Free Test
FREE
| Start Free Test |
Community Answer
The atomic number of sodium is 11 and its mass number is 23. It hasa)1...
Atomic Structure of Sodium
Sodium is a chemical element with the atomic number 11, which means it has 11 protons in its nucleus. The mass number of sodium is 23, which is the sum of its protons and neutrons.
Calculating Neutrons and Electrons
To find the number of neutrons, subtract the atomic number from the mass number:
Neutrons = Mass number - Atomic number
Neutrons = 23 - 11
Neutrons = 12
Since atoms are electrically neutral, the number of protons must be equal to the number of electrons. Therefore, sodium also has 11 electrons.
Correct Answer
So, the correct option is:
c) 11 electrons and 12 neutrons
This combination balances the positive charge from the protons with the negative charge from the electrons, and accounts for the atomic structure of sodium.
Sodium is a chemical element with the atomic number 11, which means it has 11 protons in its nucleus. The mass number of sodium is 23, which is the sum of its protons and neutrons.
Calculating Neutrons and Electrons
To find the number of neutrons, subtract the atomic number from the mass number:
Neutrons = Mass number - Atomic number
Neutrons = 23 - 11
Neutrons = 12
Since atoms are electrically neutral, the number of protons must be equal to the number of electrons. Therefore, sodium also has 11 electrons.
Correct Answer
So, the correct option is:
c) 11 electrons and 12 neutrons
This combination balances the positive charge from the protons with the negative charge from the electrons, and accounts for the atomic structure of sodium.
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
|
|
Top Courses for Class 9View all
The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. Can you explain this answer?
Question Description
The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. 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 The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. 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 The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. Can you explain this answer?.
The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. 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 The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. 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 The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. Can you explain this answer?.
Solutions for The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. 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 The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The atomic number of sodium is 11 and its mass number is 23. It hasa)11 neutrons and 12 protonsb)12 protons and 11 electronsc)11 electrons and 12 neutronsd)12 electrons and 11 neutronsCorrect answer is option 'C'. 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