Selected Elements : Selected Elements
Einsteinium (Es) : Einsteinium (Es) Albert Einstein
Relativity
E = mc2
Offered Presidency of Israel
Element 99
Photoelectric effect
Solar calculator
Curium (Cm) : Curium (Cm) Madame Curie
Pioneer in radioactivity
(Ra = radium)
25 pounds of pitchblende ore yields 1/1000 of a gram of radium
Emits 2 millions times as much radiation as uranium
(Rn = radon gas)
Discovered 5 elements
Nobel Prize (5 in Curie family)
Born in Poland
(Po = polonium) Marie Curie (1876–1934)
Radium (Ra) : Radium (Ra) Radium was used as a fluorescent paint on watch dials. It was
applied with thin brushes that workers would lick to keep a fine tip.
Many people died from the exposure to radium.
Slide 5 : Radon Gas Radon gas occurs naturally
from the radioactive decay
of radium. Radium is found
in small amounts in rock. Ra ? Rn + radiation Predicted fraction of homes over 4 picocuries/liter radon Zone 1 counties have a predicted average indoor radon screening
level greater than 4 pCi/L (pico curies per liter) (red zones) Zone 2 counties have a predicted average indoor radon screening
level between 2 and 4 pCi/L (orange zones) Zone 3 counties have a predicted average indoor radon screening
level less than 2 pCi/L (yellow zones) http://www.epa.gov/radon/zonemap.html
Nobelium (No)Element 102 : Nobelium (No)Element 102 Alfred Nobel Nobel Prize Inventor:
dynamite (TNT)
blasting gelatin “Merchant of Death” Trinitrotoluene
Seaborgium (Sg) : Seaborgium (Sg) Glenn Seaborg
Separated f-block from rest of periodic table
Worked on Manhattan Project
(Atomic bomb)
Classified until after WW II
Element 106
Only living person to have an element named for them
Silicon vs. Silicone : Silicon vs. Silicone Silicon (Si) element
Silicone (…Si – O – Si…) polymer
Sealant (caulk) prevents leaks
Breast augmentation No cause-and-effect relationship exists between
breast enlargement and breast cancer. Only one
researcher found a causal link.
Magnesium : Magnesium Atomic Mass 24 amu
melting point =
silver gray metal
used in flash bulbs, bombs,and flares
8th most abundant element (2.2% of Earth’s crust)
lack of Mg produces same biological effect
as alcoholism (delirium tremens)
Potassium Metal in Water : Potassium Metal in Water Newmark, CHEMISTRY, 1993, page 25