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प्रश्न
Four elements A, B, C and D have the following electron arrangements in their atoms:
| A | 2, 8, 6 |
| B | 2, 8, 8 |
| C | 2, 8, 8, 1 |
| D | 2, 7 |
(a) What type of bond is formed when element C combines with element D?
(b) Which element is an inert gas?
(c) What will be the formula of the compound between A and C?
उत्तर
(a) When element C combines with element D, an ionic bond is formed between them by transfer of one electron from element C atom to element D atom.
(b) Element B is an inert gas because it has 8 electrons in its valence shell; i.e, it contains completely filled valence shell.
(c) Formula of the compound will be AC2. Because element A needs two electrons to complete its octet, two atoms of element C donate two electrons to element A and get stabilised.
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