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2.20 - valence electrons but since it has a-1 charge it...

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Key for Micro Exam 2 Question 20 Question 20: Which of the structures is the correct Lewis structure for the beryllium ion (Be - ) that has one extra electron? Answers: (a) (b) (c) (d) (e) (f) When drawing a Lewis structure, we first need to know the total number of valence electrons the ion has. From beryllium’s position on the periodic table we know that it normally has two
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Unformatted text preview: valence electrons but since it has a -1 charge, it will have three valence electrons. We can draw this by positioning one electron on three of the four sides of Be as depicted in the correct answer (f), . The brackets and negative charge denote that this is an ion of Be and not its neutral state....
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