Element of the Day Cm Curium ( /ˈkjʊәriәm/ kewreeәm) is a transuranic radioactive chemical element with the symbol Cm and atomic number 96. This element of the actinide series was named after Marie Curie and her husband Pierre Curie both were known for their research on radioactivity. Curium was first intentionally produced and identified in July 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley. Most curium is produced by bombarding uranium or plutonium with neutrons in nuclear reactors – one tonne of spent nuclear fuel contains about 20 grams of curium.
Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Curium readily oxidizes, and its oxides are a dominant form of this element. When introduced into the human body, curium accumulates in the bones, lungs and liver, where it promotes cancer.
All known isotopes of curium are radioactive and have a small critical mass for a sustained nuclear chain reaction. Curium is used in production of heavier actinides and of the 238Pu radionuclide for power sources in artificial pacemakers. It served as the α source in the alpha particle Xray spectrometers installed on the Sojourner, Mars, Mars 96, Athena, Spirit and Opportunity rovers to analyze the composition and structure of the rocks on the surface of Mars and the Moon.
1 Chemistry 1. Element of the Day 2. Electron Configuration Notes 3. POGIL Activity 4. Start Homework Announcements Due Today: Read pages 289 to 299 and answer questions 29, 31 34, 36, 37, 38, 41 and 43.
Due Thursday/Friday: POGIL ACTIVITY and read pages 299 307 and answer questions 57, 58, 64, 69, 74, 80, and 81.
Extra Credit: Crossword Puzzle Due Monday
2 Electron Configuration Notes
1s Orbital
Principal energy levels
Sublevels
Draw figure 10.22/10.23
3 Electron Configuration Notes
4 Electron Configuration Notes
5 Electron Configuration Notes Pauli Exclusion Principle
6 Electron Configuration Notes
Key Terms
Electron configuration
Orbital diagram (box diagram)
Valence electrons
7 Write the electron configuration for the following:
1. H
2. He
3. C
4. F
5. Ca
How many electrons can fit into the 2nd principal quantum level?
How many electrons could be found in the 3rd principal quantum levels?
8 Electron Configuration Notes Trends in the Periodic Table
Metals
Nonmetals
Metalloids
Ionization energy
Atomic Size
9 POGIL Activity
10 Exit Question There are a maximum of _____ electrons that can be held in the third principal quantum level.
Reminder
Due Thursday/Friday: POGIL ACTIVITY and read pages 299 307 and answer questions 57, 58, 64, 69, 74, 80, and 81.
Extra Credit: Crossword Puzzle Due Monday
11