WAEC Chemistry 2025 Theory — Question 8
Question 8 of 70 from the West African Examinations Council (WAEC) Chemistry 2025 Theory paper, with the correct answer and a full explanation.
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1(e)(ii). Write the electron configuration for 11Na+.
Model answer
1s2 2s2 2p6 (Na+ has 10 electrons; it loses 1 electron from the neutral Na atom, 1s2 2s2 2p6 3s1)
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