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Batra Sahab
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Asked: 2025-02-01T09:19:56+00:00 In:

The number of neutrons in sodium and magnesium is

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100%(a) 12 and 12 respectively. ( 3 voters )
0% (b) 11 and 12 respectively.
0%(c) 11 and 11 respectively.
0%(d) 12 and 11 respectively.
Based On 3 Votes

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To find the number of neutrons in sodium (Na) and magnesium (Mg), we subtract the atomic number from the atomic mass:
Sodium (Na) has an atomic number of 11 and an atomic mass of 23. Neutrons = 23 – 11 = 12.
Magnesium (Mg) has an atomic number of 12 and an atomic mass of 24. Neutrons = 24 – 12 = 12.
So, the correct answer is (a) 12 and 12 respectively.
Class 9th Science NCERT MCQ Questions
NCERT Books MCQ Questions Session 2024-2025.

class 9thmcqnumber of neutronsscience
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    1 Answer

    1. (a) Sodium and magnesium both contain 12 neutrons each.

      https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/

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