WindelCaceus123 WindelCaceus123

18-11-2018
Chemistry

contestada

An atom of potassium has an atomic mass of 39 amu and an atomic number of 19. It therefore has ______ neutrons in its nucleus. a. 19 c. 20 b. 39 d. 2

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Аноним Аноним

18-11-2018

i believe the answer is c) 20

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hanimani2 hanimani2

18-11-2018

The answer will be option c

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