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09-03-2021
Chemistry

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How many neutrons does calcium have?
.20. 60. 79. 40

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rpmullgiri rpmullgiri

09-03-2021

Answer:

20

Explanation:

Atomic number/proton number = 20 (protons in nucleus)

Atomic mass number = 40 (protons + neutrons in nucleus)

40 - 20 = 20

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