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ICSE Class 10 Answered

Element X has 2 valence electrons ,element X has atomic number 7. A) Write equation to show how X and Y form ions. B) If B is a diatomic gas ,write the equation for the direct combination of X and Y to form a compound.
Asked by mittaljeevesh | 11 Dec, 2018, 07:06: PM
Expert Answer
Element X has 2 valence electrons which means it has valency = 2
 
straight X space rightwards arrow with blank on top space straight X to the power of 2 plus end exponent space plus 2 space straight e to the power of minus
element X has atomic number 7. Its electronic arrangement is (2,5) which means it's valency is 3.
 
straight Y space plus space 3 straight e to the power of minus rightwards arrow with blank on top space straight Y to the power of 3 minus end exponent
The equation for the direct combination of X and Y to form a compound.
 
3 straight X to the power of 2 plus end exponent space plus space 2 straight Y to the power of 3 minus end exponent rightwards arrow with blank on top space straight X subscript 3 straight Y subscript 2




Answered by Ramandeep | 12 Dec, 2018, 11:03: AM

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