Question

an element x (atomic no.20) burns in presence of oxygen to form a basic oxide 1.identify the element and write its electronic confrigation 2.state its group number and period number on the modern periodic table 3.write the balance chemical equation for the reaction when this oxide is dissolved in water​

Answer 1

Answer:

equation

Explanation:

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

Answer 2

Answer:

ca(oH)2

hope it helps you