Question

Video Question #3 What do elements in the same period have in common?

a
they all have the same number of valence electrons
b
they were all discovered around the same time
c
they all have the same number of energy shells
d
they all have similar properties

Answers

GPT-4o mini
The correct answer is:

c) they all have the same number of energy shells

Elements in the same period (horizontal row) of the periodic table have the same number of energy levels or shells where their electrons are located.