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17 September, 07:26

What is the atomic number of an element that has 5 protons and 7 neutrons?

12

5

7

+4
Answers (1)
  1. 17 September, 10:46
    0
    Carbon atoms with 7 neutrons have atomic mass of 13 (6 protons + 7 neutrons = 13). These atoms are the isotope called carbon-13.
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