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For an isotope of argon (Z = 18), the mass number is 40. The number of neutrons in this isotope is - a 22 b 18 c 40 d 58
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For an isotope of argon (Z = 18), the mass number is 40. The number of neutrons in this isotope is -

a 22
b 18
c 40
d 58

User Gennon
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1 Answer

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the answer is A. 22 ,because A=40 and A-z = 22

User Cwal
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