How many valence electrons does li have?

It has a single valence electron.

3pro & 3ele - it is the single electron in shell 2.

Li has 1 valence electron

for points guys

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.