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Conditions for and formula of an ionic compound

This type of question, asked 2 times: 13 Apr 2026 S1, 19 Apr 2026 S2. All 2 questions below, oldest first.

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  1. Question 1

    13 Apr 2026 S1

    3
    The electronic configurations of elements are as- A=1s2 2s2 2p6 3s2 3p6 4s2A = 1s^2\,2s^2\,2p^6\,3s^2\,3p^6\,4s^2 B=1s2 2s2 2p6 3s2 3p5B = 1s^2\,2s^2\,2p^6\,3s^2\,3p^5 Which of the following is formula of ionic compound that could be formed between these two elements A and B?

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  2. Question 2

    19 Apr 2026 S2

    4
    Which of the following is favourable condition for the formation of ionic bond ?

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