Element Properties & Groups
- Identify and describe qualitative and quantitative properties of elements.
- Classify elements as metals, metalloids, or non-metals.
- Classify elements according to chemical group.
Properties of Elements
Metals:
- Shiny
- Malleable/Ductile
- Good conductors of heat and electricity
- High melting and boiling points
Non-Metals:
- Not shiny
- Brittle
- Poor conductors of heat and electricity
Semiconductors:
- Carbon, silicon, germanium, arsenic, antimony, and tellurium
- Conductivity increases with temperature
Classification of Elements
Group 1: Alkali Metals
- Soft, shiny, low melting points
- React violently with water
- Form +1 ions
- Largest atomic radius
Group 2: Alkaline Earth Metals
- Harder, denser, and stronger than alkali metals
- Form +2 ions
- High melting points and boiling points
Group 3-12: Transition Metals
- Good conductors of heat and electricity
Group 13-16: Other Metals
- Metalloilds: B, Si, Ge, As, Sb, Te (Above the staircase)
- Anything above the metalliods are non-metals
- Anything below the metalliods are metals
Group 17: Halogens
- Highly reactive non-metals
- Form -1 ions
- High electronegativity
Group 18: Noble Gases
- Do not react with other elements