Atoms and the Periodic Table Study Guide

1. Which subatomic particle can NOT be changed?

2. Where are electrons likely to be found?

3. Which subatomic particle has the least mass?

4. Which elements share similar chemical properties? (Check their location on the periodic table.)

• O and Al
• Mg and K
• K and Na
• Na and Ne

5. An atom of Carbon has 6 protons, 6 electrons, and 6 neutrons. What is the mass number of that atom of Carbon?

6. Which two statements about isotopes are true?

• They have the same number of protons
• They have the same number of neutrons
• They have a different atomic number
• They have a different atomic mass

7. What is a vertical column on the Periodic Table referred to as?

8. How do you determine the number of Neutrons in a nucleus?

9. Which Column has a full outer energy level? (Check the Periodic Table for grouping.)

10. What are the left-to-right rows on the periodic table called?