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. - The Atomic Structure
Topic 3

24. Ionic configurations: Determining and interpreting electron configurations of ions

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1. Which is the correct electron configuration for a sodium ion (Na ) ?
1) 2 – 8 – 1 2) 2 – 8 – 8 3) 2 – 7 – 1 4) 2 – 8

2. Which electron configuration is correct for B ion?
3+
1) 2 2) 2 – 3 3) 2 – 8 4) 2 – 2 – 1

2+
3. The configuration for Sr is 2) 2 – 8 – 18 – 10 3) 2 – 8 – 18 4) 2 – 8 – 18 – 8
1) 2 – 8 – 18 – 8 – 2

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4. The ionic configuration for a calcium ion is 3) 2 – 8 – 8 4) 2 – 8 – 8 – 8

2) 2 – 8 – 2
1) 2 – 8 – 8 – 2

3-
5. Which electron configuration is correct for P ion?
1) 2 – 8 – 8 2) 2 – 8 3) 2 – 8 – 8 – 8 4) 2 – 8 – 5 – 3

6. Which configuration is correct for a Br ion?
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1) 2 – 8 – 18 – 7 2) 2 – 8 – 18 3) 2 – 8 – 18 – 8 4) 2 – 18 – 8 – 8

7. The electron configuration for an ion of oxygen could be
2) 2 – 5

3) 2 – 7
1) 2 – 4 Teacher Preview Copy 4) 2 – 8

8. The electron configuration 2 – 8 – 18 – 8 could represent which particle? 5+
2+
4+
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1) Ca 2) Ge 3) Cl 4) Br

9. A ionic configuration of 2- 8 could be of element
1) Nitrogen 2) Beryllium 3) Calcium 4) Sulfur

10. The configuration 2 could represent a configuration for
1) An atom of B 2) An ion of B 3) An atom of F 4) An ion of F

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