1. Understanding The Periodic Table
Part 1: Metals, Non-Metals, and Metalloids

2. Atoms = protons, neutrons, and electrons
Valence electrons = on the outermost shell; create bonds with other atoms

3. Arranged in order of atomic number (# of protons)
# of protons = # of electrons for neutral atoms

4. 18 Columns (‘groups’ or ‘families’) 7 Rows (‘periods’)

5. Most of the elements on the periodic table are metals

6. Metals Most are solid at room temperature Exemption: Mercury
Most are good conductors of electricity and heat
Exemption: Lead

7. Most are malleable, ductile, and have a shiny luster
Exemption: Arsenic

8. More dense than nonmetals
Density = mass
volume
Metals with a greater density than 5 𝑔/ 𝑐𝑚 3 are called heavy metals

9. Non-metals are found to the right of the table

10. Nonmetals Generally poor conductors of heat / electricity
Good insulators
Many are gasses at room temperature
Exemption: Bromine

12. Metalloids form a diagonal line

13. Metalloids
Metallic looking, brittle solids
Semi-conductors

14. Boron is used in cleaning products and heat-tempered glassware.