Question

2. For an element X, it is given that atomic number = 9 and mass number = 19 a. Write the electronic configuration of the element X. b. Find the valency.​

Answer 1

Answer:

2 . Given That ;

An Element X ,

Atomic Number = 9

Mass Number = 19

X : Fluorine ( F )

a ) Electronic Configuration :

9 = 1s² 2s² 2p5

b ) Valency :

1