Ch. 2

Question 1

Periodic Law

Answer 1

a law based on the observation that elements are arranged in order of increasing mass, certain sets of properties occur periodically

Question 2

Metals

Answer 2

• lie on lower left side and middle of the P.T
• good conductors of heat/electricity
• Often shiny
• tend to LOSE electrons when they undergo chemical changes

Question 3

Nonmetals

Answer 3

• Lie on upper right side of periodic table
• some are solids at room temperature, others are liquids and gasses
• all tend to GAIN electrons when undergoing chemical changes
• poor conductors of heat/electricity

Question 4

metalloids

Answer 4

• semiconductors
• exhibit mixed properties
• zigzag elements