Question

an element with atomic number 18 has what number of electron pairs in its valence shell​

Answer 1

hi mate

• the E.C Electronic Confrigation of an element with atomic number 18=2,8,8.
• The Valence shell is the number of electrons in the last orbit
• hence the valence electron is 8
• therefore there will be 4 electron pairs in its valence shell

Hope this helps you