Atomic Structure Unit Study Guide

1. Who is given credit for the creation of the periodic table?

• Dmitri Mendeleev
• Albert Einstein
• Democritus

2. Number assigned to the vertical columns of the periodic table is called?

• Group/Family
• Periods/Energy level
• Pods

3. What do elements in the same group/family have in common?

• Similar chemical properties
• Similar physical properties
• Similar physical and chemical properties

4. A row of chemical elements is called?

• Groups/Families
• Period/Energy level
• Chemical Properties

5. What do elements in the same period have in common?

• Same number of electron shells
• Same number of valence electrons
• Same number of energy levels

6. Define Periodic Law

• Halogens are in group 17
• Metals are most reactive to least reactive from left to right
• If elements are arranged in order of increasing atomic numbers, the elements with similar properties recure after regular intervals

7. Where are valence electrons located?

• Innermost energy level
• Middle energy level
• Outermost energy level

8. How many energy levels are there on the periodic table?

• 2
• 7
• 18

9. What is a metalloid?

• A chemical element that exhibits 100% metal
• A chemical element that exhibits some metal
• A chemical element that does not exhibit metal

10. What group number(s) contains the Transition Elements?

• 4-18
• 3-12
• 1-12