Describe how sodium and chlorine atoms are changed into ions when they react with each other to form sodium chloride, NaCl. What is the name given to this type of bonding?
ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer
Sodium has an electronic configuration of 2,8,1 and its atomic number is 11. It has one electron in its valence shell. Chlorine has an electronic configuration of 2,8,7 and atomic number is 17. Chlorine needs one electron to complete its octet. Sodium donates one electron to chlorine atom and forms sodium ion, Na+ and chlorine accept that electron and form chlorine ion Cl-
This type of bonding is called ionic bonding