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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? A: 2, 11 B: 2, 8, 1 C: 2, 8, 3 D: 2, 8, 17
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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?

A: 2, 11
B: 2, 8, 1
C: 2, 8, 3
D: 2, 8, 17

User EvilAegis
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1 Answer

4 votes
The correct answer would be (C) 2,8,3

Step-by-step explanation:
A full first shell is comprised of two electrons, and for the shells in between the max is 8 (for this small of an element, it can be larger for some larger elements; but that’s beside the point), and aluminum is in group 13 so it has 3 valance electrons.



User Arun Krish
by
6.1k points
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