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11 November, 08:50

Aluminum (Al) has an atomic number of 13 and an atomic mass of 27. Which of the following correctly shows the electron arrangement for aluminum?

1. 2, 11

2. 2, 8, 1

3. 2, 8, 3

4. 2, 8, 17

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Answers (2)
  1. 11 November, 09:52
    0
    It would be 3. 2,8,3
  2. 11 November, 11:52
    0
    The answer is 2.8.3 ...
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