1. Integrated Science Midterm Review
Chapter 5 – The Periodic Table

2. Vocabulary periodic table alkali metals period alkaline earth metals
group
halogens
periodic law
noble gases
atomic mass unit
Dmitri Mendeleev
metals
transition metals
nonmetals
metalloids
valence electrons

3. Main Ideas How did Mendeleev organize his periodic table?
How is current periodic table organized?
What is eka-aluminum? Gallium?
What does it mean if something is “periodic?”
What information can we learn from periods? Groups?
What are the characteristics of metals, nonmetals, and metalloids?
What determines how reactive an element is?
What is the most reactive metal? Nonmetal?
Why are the noble gases so unreactive?

4. Let’s Practice
Answer the following questions using your periodic table.
How many valence electrons does an atom of chlorine have? Bromine? Iodine?
How many energy levels does an atom of lead have?
Is strontium a metal or nonmetal? What state of matter is it?
How many naturally occurring elements are there?