Question:
Which of the following elements you need to remove to form an isotone family?
(A) O-16
Which of the following elements you need to remove to form an isotone family?
(A) O-16
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Isotones ⇒ same neutrons.
Updated On: May 1, 2026
- N-15
- C-14
- Al-27
- F-17
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept: Neutron number
Number of neutrons in a nucleus is given by: \[ N = A - Z \] where $A$ = mass number and $Z$ = atomic number.
Step 1: Compare neutron numbers
For each given element, calculate: \[ N = A - Z \]
Step 2: Identify mismatch
Most of the given elements have the same neutron number (isotones), while Aluminium (Al) has a different value of $N$.
Step 3: Conclusion
Hence, Aluminium does not belong to the group. Final Answer:
\[ \boxed{\text{Al is removed}} \] Note:
Elements with the same number of neutrons are called isotones.
Number of neutrons in a nucleus is given by: \[ N = A - Z \] where $A$ = mass number and $Z$ = atomic number.
Step 1: Compare neutron numbers
For each given element, calculate: \[ N = A - Z \]
Step 2: Identify mismatch
Most of the given elements have the same neutron number (isotones), while Aluminium (Al) has a different value of $N$.
Step 3: Conclusion
Hence, Aluminium does not belong to the group. Final Answer:
\[ \boxed{\text{Al is removed}} \] Note:
Elements with the same number of neutrons are called isotones.
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