1. Which subatomic particle can NOT be changed?

• Nucleus
• Proton
• Neutron
• Electron

2. Where are electrons likely to be found?

• Nucleus
• Electron Clouds
• Mixed Throughout an Atom
• In the neutrons of an atom

3. Which of the following has the least mass?

• Nucleus
• Proton
• Neutron
• Electron

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
• 18
• 12
• 15

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?

• Period
• Group/Family
• Element
• Property

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

• Add the Atomic Mass and the Atomic number
• Subtract the Mass number and the Atomic Number
• Add the Protons and Electrons
• It is written on the Periodic Table

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

• Li
• O
• B
• Ne

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

• Periods
• Groups/Families
• Element
• Property