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Valency of an element in group 2 and group 15 in periodic table. give reason |
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Answer» Explanation: (a) The number of valence electrons in X is 2. For groups 1 and 2, the number of valence electrons is equal to the group number. (b) The valency of X is 2. Valency is determined by the number of valence electrons present in the atom of the element. (c) The number of valence electrons in Y is 5. For groups 13 to 18, the number of valence electrons is equal to (group no - 10). (d) The valency of Y is 3. The number of electrons lost or GAINED by one atom of an element to achieve the nearest inert gas CONFIGURATION GIVES us the valency. FOLLOW ME |
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