Question

The atomic number of an element Y is 12.that number is element X with the chemical properties similar to those of Y is,
a-20
b-16
c-8
d-2
​

Answer 1

Answer:

a-20

Explanation:

electronic configuration of y is 2.8.2

the electronic configuration of element having at. number 20 is 2.8.8.2. So both the element have 2 eḻectrons ,thus they have similar chemical properties .

  therefore, at. no. of x is 20