Homework Help

why sodium has valency 1 and chlorine also 1?

prak10's profile pic

Posted via web

dislike 0 like

why sodium has valency 1 and chlorine also 1?

1 Answer | Add Yours

Top Answer

pramodpandey's profile pic

Posted (Answer #1)

dislike 1 like

Sodium has atomic mass 23, atomic number 11.

Chlorine has atomic mass 35 ,atomic number 17.

When we write electronic configuration

for Sodium Na - 2,8,1

Chlorine   Cl - 2,8,7

Both Na and Cl  require 1 electron either to loose or to gain ,so they can attain stable configuration.

Therefore  Na has +1 and Cl -1 valency

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes