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13 September, 19:16

How many protons are in an element with an atomic number of 8 and a mass number of 18?

a. 8

b. 10

c. 18

d. 3

+5
Answers (2)
  1. 13 September, 21:41
    0
    A) 8, atomic number also means proton number
  2. 13 September, 22:24
    0
    Since the atomic number is 8 that will be the number of protons given that the element is a neutral element meaning that the number of protons and electrons are the same. Therefore the answer is 8
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