An element ‘X’ (Atomic number = 20) burns in the presence of oxygen to form a basic oxide. (a) Identify the element and write its electronic configuration. (b) State its group number and period number in the Modern Periodic Table. c) Write a balanced chemical equation for the reaction when this oxide is dissolved in water.
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a) Element is Calcium. It belongs to the 2nd group and 3rd period of the Modern Periodic table.
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a) calcium is the element having electronic configuration is 2, 8 ,8,2
b) belongs to the second group and third Period of the modern periodic table
c) CaO + H2O --------> CaO(OH)2
b) belongs to the second group and third Period of the modern periodic table
c) CaO + H2O --------> CaO(OH)2
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