Answer:
I'm not sure what is unclear but I can try to help...
Explanation:
So the group is the number at the top and is verticle. So H,Li,Na, and K share the same Group, 1.
The period is the number at the side and is horizontal. Soo H and He are Period 1.
Now using this information we can find the specifics of each element.
Chlorine, for example, is Group 17A and Period 3 because it matches those.
Let me know if you need further explanation :)
