Atoms and the Periodic Table Study Guide

1. Which subatomic particle can NOT be changed?

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2. Where are electrons likely to be found?

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3. Which subatomic particle has the least mass?

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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?

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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?

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

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

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

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