Your SlideShare is downloading. ×
0
Francium
Francium
Francium
Francium
Francium
Francium
Francium
Francium
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Francium

451

Published on

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
451
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
13
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • Transcript

    • 1. Francium By Ciera Johnson
    • 2. Basic Information• Atomic Symbol: Fr• Atomic Number: 87• Protons: 87• Electrons: 87• Neutrons: 136• Average Atomic Mass: 223
    • 3. Continued • Group in periodic table: 1 • Group name: Alkali metal • Period in periodic table: 7 • Melting point: 27.2ºC (80.96ºF) • Boiling point: 677ºC (1,250.6ºF)• It is so radioactive and hard to work with, there is not much known about Francium.• It also has no uses because it is so radioactive.
    • 4. Interesting Information• The second rarest naturally occurring element.• It was the last element discovered in nature, that isn’t synthesis.• The most unstable of the naturally occurring elements• As little as 20–30 g (one ounce) exists at any given time throughout the Earth’s crust.
    • 5. Discovery • Francium (Eka-caesium) was discovered in 1939 by Marguerite Perey of the Curie Institute in Paris, France • This element existence was predicted by Mendeleev during the 1870s, he called it eka-caesium.
    • 6. Isotopes• There are 34 identified Francium isotopes.• There are no stable isotopes of Francium.• Francium-223 is the most stable isotope with a half-life of 21.8 minutes• The least stable ground state isotope is francium-215, with a half-life of 0.12 "s.• All isotopes of Francium decay into either astatine, radium, or radon.
    • 7. Atomic Structure. • 7 Energy Levels • 1st: 2 • 4th: 32 • 2nd: 8 • 5th: 18 • 3rd: 18 • 6th: 8 • 7th: 1
    • 8. Courses Cited• http://en.wikipedia.org/w/index.php? title=Francium&printable=yes• http://www.andyscouse.com/pages/francium.htm• http://www.chemicalelements.com/elements/ fr.html• http://www.aip.org/history/newsletter/fall2004/ strasbourg-photo.htm• http://www.webqc.org/periodictable-Francium- Fr.html• http://www.periodicvideos.com/videos/087.htm

    ×