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Correct expression for mass number A is
- a)A = number of protons (Z)+ number of neutrons (n)
- b)A = number of electrons (Z)+ number of positrons (n)
- c)A = number of protons (Z)+ number of electrons(n)
- d)A = number of nucleons (Z)+ number of neutrons (n)
Correct answer is option 'A'. Can you explain this answer?
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Correct expression for mass number A isa)A = number of protons (Z)+ nu...
mass no. = no. of protons + no. of neutrons.
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Correct expression for mass number A isa)A = number of protons (Z)+ nu...
Mass number (A) is defined as the total number of protons (Z) and neutrons (n) present in the nucleus of an atom. The correct expression for mass number is A = number of protons (Z) + number of neutrons (n). Let's break down the components of this expression to understand it better.
Explanation:
1. Mass Number (A): The mass number of an atom is the total number of protons and neutrons present in its nucleus. It is denoted by the symbol A.
2. Number of Protons (Z): The number of protons in an atom is also known as the atomic number. It defines the identity of the atom and determines its place in the periodic table. The number of protons is denoted by the symbol Z.
3. Number of Neutrons (n): Neutrons are subatomic particles that have no charge. They are found in the nucleus of an atom along with protons. The number of neutrons is denoted by the symbol n.
4. Addition of Protons and Neutrons: The mass number (A) is obtained by adding the number of protons (Z) and the number of neutrons (n) together. This is because protons and neutrons contribute to the mass of an atom, while electrons have negligible mass.
5. Example: Let's take the example of carbon-12. Carbon has an atomic number (Z) of 6, which means it has 6 protons. The mass number (A) of carbon-12 is 12, which means it has 12 - 6 = 6 neutrons. Thus, the expression A = Z + n holds true for carbon-12 (A = 6 + 6).
In summary, the correct expression for mass number (A) is A = number of protons (Z) + number of neutrons (n). This expression represents the total number of protons and neutrons present in the nucleus of an atom, which together contribute to its mass.
Explanation:
1. Mass Number (A): The mass number of an atom is the total number of protons and neutrons present in its nucleus. It is denoted by the symbol A.
2. Number of Protons (Z): The number of protons in an atom is also known as the atomic number. It defines the identity of the atom and determines its place in the periodic table. The number of protons is denoted by the symbol Z.
3. Number of Neutrons (n): Neutrons are subatomic particles that have no charge. They are found in the nucleus of an atom along with protons. The number of neutrons is denoted by the symbol n.
4. Addition of Protons and Neutrons: The mass number (A) is obtained by adding the number of protons (Z) and the number of neutrons (n) together. This is because protons and neutrons contribute to the mass of an atom, while electrons have negligible mass.
5. Example: Let's take the example of carbon-12. Carbon has an atomic number (Z) of 6, which means it has 6 protons. The mass number (A) of carbon-12 is 12, which means it has 12 - 6 = 6 neutrons. Thus, the expression A = Z + n holds true for carbon-12 (A = 6 + 6).
In summary, the correct expression for mass number (A) is A = number of protons (Z) + number of neutrons (n). This expression represents the total number of protons and neutrons present in the nucleus of an atom, which together contribute to its mass.
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Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)Correct answer is option 'A'. Can you explain this answer?
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Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)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 Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)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 Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)Correct answer is option 'A'. Can you explain this answer?.
Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)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 Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)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 Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)Correct answer is option 'A'. Can you explain this answer?.
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ample number of questions to practice Correct expression for mass number A isa)A = number of protons (Z)+ number of neutrons (n)b)A = number of electrons (Z)+ number of positrons (n)c)A = number of protons (Z)+ number of electrons(n)d)A = number of nucleons (Z)+ number of neutrons (n)Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 11 tests.
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