Valence Electrons of Elements (Simplified) Practice Problems

True or False. Going from left to right across Period 3, the number of valence electrons remains the same.

True or False. Going down group 4A (14), the number of valence electrons decreases.

Give the number of valence electrons and group number for livermorium.

Determine the number of inner, outer and valence electrons in an atom of the given elements?

a. O

b. C

c. Fe

d. Mg

e. S

Select the group of elements that have their valence electrons in the same shell.