periodic table n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Periodic Table PowerPoint Presentation
Download Presentation
Periodic Table

Loading in 2 Seconds...

play fullscreen
1 / 17

Periodic Table - PowerPoint PPT Presentation


  • 127 Views
  • Uploaded on

Periodic Table. A Work in Progress. History. 1817 German chemist Johann Dobereiner Triads of similar chemical properties 1864 John Newlands – English Law of Octaves 1869 Dmitri Mendeleev – Russian Cards, left holes where he thought elements should be Dutch Anton van den Broek

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Periodic Table' - jacob


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
periodic table

Periodic Table

A Work in Progress

history
History
  • 1817 German chemist Johann Dobereiner
    • Triads of similar chemical properties
  • 1864 John Newlands – English
    • Law of Octaves
  • 1869 Dmitri Mendeleev – Russian
    • Cards, left holes where he thought elements should be
  • Dutch Anton van den Broek
    • arranged according to charge, not mass
organization
Organization
  • Periods – ROWS
    • properties change gradually
  • Group (family) – COLUMNS
    • have similar properties
key to the periodic table
Key to the Periodic Table
  • Element name
  • Atomic number (Whole #, element ID)
  • Symbol
  • Atomic mass (weighted average of isotopes)
  • State of matter
metals
Metals
  • Solids (except mercury)
  • Luster (shiny)
  • Conducts heat, electricity
  • Maleable (easily shaped)
  • Ductile (can be shaped into wire)
non metals
Non-metals
  • Gases or brittle solids
  • Poor conductors of electricity
  • Only 17
metalloids semimetals
Metalloids - Semimetals
  • Some properties of metals/nonmetals
groups columns
Groups (Columns)
  • Representative elements – groups 1-2, 13-18 (some metals, metalloids, non-metals)
  • Transition elements – groups 3-12 – metals
  • Inner transition elements – inside bottom 2 rows – lanthanide, actinide series
group 1 alkali metals
Group 1 Alkali Metals
  • Far left column on PT
  • Silvery solids
  • Low density
  • React violently with water, burns skin
  • Never found in pure form in nature
  • Forms +1 ions
group 2 alkaline earth metals
Group 2 Alkaline Earth Metals
  • 2nd column from left
  • Denser, harder, higher melting points
  • Not as reactive as alkali metals
  • Burn different colors – fireworks!
  • Forms +2 ions
groups 13 16
Groups 13-16
  • BCNO – large family, diverse
    • Similar bonding characteristics
  • Group 13 – Boron family
  • Group 14 – carbon family
  • Group 15 – Nitrogen group
  • Group 16 – Oxygen family
    • Forms -2 ions
halogens
Halogens
  • Group 17
  • Forms salts/ -1 ions
  • Poisonous
  • Very reactive
  • Not found in pure form in nature
  • When bonded to Carbon, destroys ozone layer
noble gases
Noble Gases
  • Far right of PT
  • Gases
    • Light up when electrical current goes through
  • Don’t react
  • Outer energy levels filled
  • Group 18
transition metals
Transition Metals
  • Groups 3-12
  • Conduct heat, electricity
  • Combine with oxygen different ways
  • Dissolve in acid (except gold)
  • Higher melting points than other elements
inner transition metals
Inner Transition Metals
  • Lanthanides
    • Soft, silvery metals
    • Spark when struck
  • Actinides
    • all radioactive
    • Some synthetic
energy levels
Energy Levels
  • 2
  • 8
  • 8
  • 18
  • 18
  • 32
  • 32
valance electrons
Valance Electrons
  • In outer incomplete energy level
  • Used to bond with other atoms
  • Shown in electron dot diagrams