1. How are the valence electrons in lithium and sodium atoms different?

if you look at the number at the top of the element square you can find the amount of positive atoms wich is also the amount of negative atoms. so if you count the valence electrons then that would be you difference

explanation:

Valence electrons are the amount of negative atoms on the outermost shell.

they are made of gases.

they have a spherical shape.

they make energy through fusion.