Periodic Table

Select atomic weight
Describe how it changes from left to right It increases
Top to bottom It increases.

Select atomic radius
Describe how it changes from left to right It decreases
Top to bottom It increases

Select density
Describe how it changes from left to right It increases, and then decreases.
Top to bottom It mostly increases

Select boiling point
Describe how it changes from left to right It increases and then decreases and then increases
Top to bottom It’s inconsistent

Select electronegativity
Describe how it changes from left to right It mostly increases
Top to bottom Some increases while some decreases.
Go to http://www.webelements.com/
 
Pick four elements from four different families. Get a picture of each and the history of the element. Put them in the word document, save it to your house and upload it in Moodle.

Calcium was discovered by Sir Humphrey Davy at 1808 in England.Origin of name: from the Latin word "calx" meaning "lime".
http://womensvoicesforchange.org/wp-content/uploads/2009/04/calciumsvg.png

Silver was discovered by Known since ancient times at no data in not known. Origin of name: from the Anglo-Saxon word "siolfur" meaning "silver" (the origin of the symbol Ag comes from the Latin word "argentum" meaning "silver").

http://upload.wikimedia.org/wikipedia/commons/a/a8/Electron_shell_047_silver.png

 

Oxygen was discovered by Joseph Priestley, Carl Scheele at 1774 in England, Sweden. Origin of name: from the Greek words "oxy genes" meaning "acid" (sharp) and "forming" (acid former).

 http://oxygenj10.imascientist.org.uk/files/2010/05/Oxygen1.png

 

Curium was discovered by Glenn T. Seaborg, Ralph A. James, Albert Ghiorso at 1944 in USA. Origin of name: named after Pierre and

Marie "Curie"

http://upload.wikimedia.org/wikipedia/common/d/d8/Electron_shell_096_curium.png