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Chemistry notes on radioactivity and carbon dating/decay

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Chemical changes: breaking bonds between atoms + rearranging into new compounds. Nuclear Changes: changes in p&n within a nucleus, not between atoms. Half life= time it takes for ? of parent nuclides in radioactive sample to decay. Ex. Element has ? life of 5 seconds left in 1 minutes. So divide 60 sec by 5 sec. = 12. Nuclide: name given to nucleus of a specific isotope that is decaying. Ex. U-238 and U-239. Radiation. Chain rxn: nuclear rxn that becomes self propagating. Critical Mass: minimum amount of original mass undergoing fission to sustain a chain rxn. Nuclear Waste: low level- buried in barrels in the ground (lab wastes, industry) High level- stored in concrete bunkers in ground (spent fuel rods)

Reign of Terror/Napoleon Boneparte

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pp. 587-591 1. The Terror (1793-1794) a. National crisis and foreign threat → Revolution enters most radical phase b. Failed effort of king and queen to escape from Paris and find foreign allies costs them a loss of support i. Viewed as treasonous ii. March to similar to that which had marched on Versailles invaded his palace on August 10, 1792 iii. King seeks protection in Legislative Assembly which suspends him and orders his imprisonment 1. Called formation of National Convention to be elected by vote of all men c. Counterrevolutionary plots → Uproar of working class i. September mobs kill half of prisoners in a surge d. Louis Xvi, charged with treason by National Convention, is sentenced to death i. France declared republic ii. Guillotine ended king’s life in 1793

Separation of Components of a Mixture Lab

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Separation of the Components of a Mixture Dillan Patel, Joe Marciano, Jamie Henzes Pre Lab Questions Mixtures are not uniform in compositing and are characterized by two properties: each of the substances in the mixture retains its chemical integrity and mixtures are separable into these components by physical means. An impure substance is a mixture where one of the substances is preponderant and far exceeds the amounts of the other substances in the mixture. Sublimation is the process in which a solid passes directly to the gaseous state and back to the solid state without the appearance of a liquid state. In this lab we sublimed NH4CL by applying heat.

The Night Thoreau Spent In Jail

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The Night Thoreau Spent in Jail is an exciting, poignant, accessible, and intellectually engrossing play in two acts, with several shifting and interpolated scenes from the real and imagined life of Henry David Thoreau (1817-62), the great nineteenth- century American author and poet-philosopher. The play is a dramatic representation of a vital moment in our history, in which the 29-year-old Thoreau?s ardent refusal to pay taxes?in protest to the United States government?s involvement in the Mexican War?landed him in prison in his home of Concord, Massachusetts. This famous act of civil disobedience?daring and unprecedented though it was? is merely the point of departure for Jerome Lawrence and Robert E. Lee?s widely

The Night Thoreau Spent In Jail

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The Night Thoreau Spent in Jail is an exciting, poignant, accessible, and intellectually engrossing play in two acts, with several shifting and interpolated scenes from the real and imagined life of Henry David Thoreau (1817-62), the great nineteenth- century American author and poet-philosopher. The play is a dramatic representation of a vital moment in our history, in which the 29-year-old Thoreau?s ardent refusal to pay taxes?in protest to the United States government?s involvement in the Mexican War?landed him in prison in his home of Concord, Massachusetts. This famous act of civil disobedience?daring and unprecedented though it was? is merely the point of departure for Jerome Lawrence and Robert E. Lee?s widely

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