Practice: Which of the following is a metalloid that is also a chalcogen?
The Periodic Table can be further classified into Periods and Groups.
Concept #1: In the Periodic Table, the periods represent the horizontal rows and the groups represent the vertical columns.
Example #1: Which of the following is a metal in the 4th Period?
a) Sodium, Na
b) Strontium, Sr
c) Bromine, Br
d) Calcium, Ca
e) Aluminum, Al
Practice: Which of the following is a metalloid that is also a chalcogen?
