Question

How can i know the valence electron for the big elements

Answer 1

the group number of the element shows the number of valence electrons. for example, if you want to find the valence electron of oxygen, you see that it is in group 16 on the periodic table, so you look at the last number which is 6, meaning oxygen has 6 valence electrons.

Step-by-step explanation:

Answer 2

Use the group numbers to determine the number of valence electrons. The Group number of a non-transition metal can be used to find the number of valence electrons in an atom of that element. The ones place of the group number is the number of valence electrons in an atom of these elements.