Elements and The Periodic Table - PowerPoint PPT Presentation

About This Presentation
Title:

Elements and The Periodic Table

Description:

... Alkaline Earth Metals Groups 3-12: Transition Metals Group 17: Halogens Group 18: Noble Gases Lanthanides (Rare Earth Metals) Actinides Practice! ... – PowerPoint PPT presentation

Number of Views:159
Avg rating:3.0/5.0
Slides: 25
Provided by: fsmithPbw6
Category:

less

Transcript and Presenter's Notes

Title: Elements and The Periodic Table


1
Elements and The Periodic Table
2
(No Transcript)
3
The Super 7 Diatomic Elements I Have No Bright
Or Clever Friends HOFBrICl
4
Pure substance or mixture Element or compound heterogeneous or homogeneous
chlorine pure substance element (molecule)
water pure substance compound
soil mixture heterogeneous
sugar water mixture homogeneous
oxygen pure substance element (molecule)
air mixture homogeneous
carbon dioxide pure substance compound
cookie dough mixture heterogeneous
propane pure substance compound
iron pure substance element (atom)
5
History of the Periodic Table
  • 330 B.C - 4 elements
  • 1800 - 31 elements
  • 1865 - 63 elements
  • Chemists required a systematic method to organize
    the elements

6
John Newlands
  • 1864
  • Arranged all known elements in order of
    increasing atomic mass
  • Observed that every 8th element had similar
    physical and chemical properties (Law of Octaves)
  • Began to group these elements into families

7
Lothar Meyer
  • 1865
  • Also arranged the elements in order of increasing
    atomic mass
  • Found repeating patterns and developed a table of
    elements

8
Dimitri Mendeleev
  • 1869
  • Noticed same patterns as Newlands Meyer
  • Because Mendeleev published his table first, he
    is credited as the Father of the Periodic Table
  • Now, elements are not arranged by atomic mass
  • Periodic Law When arranged by atomic number, the
    properties of the elements repeat at regular
    intervals.

9
Amazing!
10
Within YOUR Lifetime
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
and the same number of valence electrons
15
(No Transcript)
16
Hydrogen(A class of its own)
  • Sometimes it behaves like an alkali metal,
    sometimes like a halogen, and sometimes in its
    own unique way.

17
Group 1 Alkali Metals
  • 1 valence electron (electrons in their outermost
    shell)
  • Soft, shiny, easily cut with a knife
  • The most reactive metals
  • React violently with water (stored in oil or a
    vacuum)
  • React with halogens to form salts

18
Group 2 Alkaline Earth Metals
  • 2 valence electrons
  • Light, reactive metals

19
Groups 3-12 Transition Metals
  • 1 or 2 valence electrons
  • Strong, hard metals
  • Good conductors of heat and electricity
  • Wide range of chemical and physical properties

20
Group 17 Halogens
  • 7 valence electrons
  • Extremely reactive nonmetals

21
Group 18 Noble Gases
  • Full outer shell
  • Extremely unreactive (inert)

22
Lanthanides (Rare Earth Metals)
  • Elements 57-70

23
Actinides
  • Elements 89-102
  • Transuranic Elements Synthetic elements
  • (elements 93)

24
Practice!
  • p. 11 1, 2
  • p. 20 16-20
  • p. 21 4
Write a Comment
User Comments (0)
About PowerShow.com