Question

The electronic configuration of an element is given below.

Answer 1

 The statement  which  is true  about  the reactivity  of  element  with          1S²2S²2P⁶3S¹   is

 it is reactive   because it has to lose one  electron  to have  a full  outermost  energy  level.

Explanation

• Element  with     1S²2S²2P⁶3S¹  electron configuration  is    a sodium  metal.

•    sodium  has  one  electron  in the outermost energy level.

• for  sodium to have  a full  outermost  energy level (  8 electrons) it   loses  the  1  electron   in 3S¹ to  form   a positively  charged ion. (Na⁺)