Kategorier: Alle - reactivity - conductivity - elements - metals

af Bronwyn Heard 4 år siden

302

THE PERIODIC TABLE

The periodic table organizes elements into major categories based on shared physical and chemical properties. Metals, for example, are characterized by their lustrous appearance, malleability, and high density, and they are excellent conductors of heat and electricity.

THE PERIODIC TABLE

THE PERIODIC TABLE

Major Categories

Metalloids
Key Elements: Boron, Silicon, Germanium, Arsenic Physical Properties: Shiny, Brittle, Good Electrical Conductivity Chemical Properties:
Non Metals
Key Elements: Hydrogen, Helium, Nitrogen, Oxygen Physical Properties: Dull, Weak, Brittle Chemical Properties: Poor heat conductor, Do not react with air at room temperature, Poor conductor of electricity
Metals
Key Elements: Gold, Aluminum, Copper, Iron Physical Properties: Lustrous, Malleable, High density Chemical Properties: Great conductor of heat as well as electricity, does not react with room temperature water
Noble Gasses
Key Elements: Neon, Krypton, Xenon, Argon Physical Properties: Conduct electricity, colourless, odourless Chemical Properties: Low chemical reactivity, Extremely stable, do not react with water
Halogens
Key Elements: Chlorine, Florine, Bromine, Iodine Physical Properties: Low melting point, Low boiling point, range of states Chemical Properties: Cannot conduct electricity, nor heat, react slightly with water
Transition Metals
Key Elements:Iron, Copper, Zinc, Titanium Physical Properties: Malleable, High density, High melting point Chemical Properties: Oxidize in air, rarely react with water, React slowly with acids
Alkaline Earth Metals
Key Elements: Beryllium, Magnesium, Calcium Physical Properties: Lustrous, Low density, Low melting point Chemical Properties: Very reactive in water, air and acid
Alkali Metals
Key Elements: Lithium, Sodium, Potassium Physical Properties: Lustrous, Soft, Low melting point Chemical Properties: Highly reactive with air, as well as water and acid