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11.1 The building blocks of molecules  (Page 9/33)

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9 / 33  An isotope of sodium (Na) has a mass number of 22. How many neutrons does it have?
A  11
B  12
C  22
D  44
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Practice MCQ 3 FlashCards 1 Key Terms 23

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Source:  OpenStax, Concepts in biology (biology 1060 tri-c). OpenStax CNX. Jan 15, 2014 Download for free at https://legacy.cnx.org/content/col11617/1.1
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