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The atomic number of four elements are given below. (The symbols ore not real) A – 8 B – 10 C – 12D – 18 a. Write the sub-shell electronic configuration of the elements, b. Which of them are inert gases? c. Write the chemical formula of the compound formed by two elements other than inert gases. |
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Answer» a. A – 1s2 2s2 2p4 B – 1s2 2s2 2p6 C – 1s2 2s2 2p6 3s2 D – 1s2 2s2 2p6 3s2 3p6 b. B, D c. CA, (C2 A2 is simplified and written as CA) |
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