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TO DO:. Finish the equation for following reactions. Uranium -92 combined with a BETA PARTICLE . Bromine-83 went through ALPHA decay. Update your completion chart. Shade in your most recent grade on your tracker. Work on the Neuron Activation. 80% Brilliance!. Brandi Brisby
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TO DO: • Finish the equation for following reactions. • Uranium-92 combined with a BETA PARTICLE. • Bromine-83 went through ALPHA decay. Update your completion chart. Shade in your most recent grade on your tracker. Work on the Neuron Activation
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The Breakdown of the Day • Explore – Half Life • Understand – Solve Half Life Problems • Opportunity – Understandthe process of how we age fossils; insight into the field of Anthropology ChemMastery
Half Life and Time • Half-Life: The amount of time it takes for a particle to lose __________ its mass
Half Life and Time The half-life for gold-198 is about 3 days. If it has been 6 days how many half-lives has the gold gone through?
Half Life and Time Neon-10 went through two half-lives in 40 seconds. How long does it take to go through one half-life?
Half Life in Fractions • To represent half-life in fractions, every time a substance goes through a half-life multiply the amount of substance by a _________.
Half Life in Fractions If Thorium-232 undergoes 1 half-life then what fraction of the particles would be left?
Half Life in Fractions If there is 1/8 of Strontium-90 left, then how many half-lives has it been through?
Finding the Mass of an Object • If you are trying to find the remaining amount of a substance, multiply the amount by the __________ left.
Finding the Mass of an Object If I 10g of Bismuth-208 goes through 1 half-life, then how much is left?
Finding the Mass of an Object If I 20g of iodine-131 goes through 2 half-lives, then how much is left?
Half Life in Graphs • Every half-life decreases the amount of mass in ___________.
Draw graphical representation of a substance that goes through 4 half lives. Amount of Mass Number of Half Lives
Guided Practice SHOW and TELL
TIME The half-life for Radon is about 3 days. If it has been 6 days how many half-lives has the gold gone through?
TIME The half-life for Carbon-10 is about 20 seconds. If it has been 60 seconds how many half-lives has the carbon gone through?
TIME Boron went through 2 half life and it took 6 days. How long is one half life?
TIME C-10 went through 3 half-lives in 60 seconds. How long is the half-life for C-10?
FRACTIONS If Silver-111 went through 2 half lives then what fraction would be remaining?
FRACTIONS If Pb-210 went through 4 half lives then what fraction would be remaining?
FRACTIONS If 1/8 of Gallium-72 is left, then how many half lives has it been through?
FRACTIONS If 1/16 of Sulfur-35 is left, then how many half lives has it been through?
FINDING THE MASS If I 10g of oxygen-19 goes through 1 half-life, then how much is left?
FINDING THE MASS If I 200g of sulfur-37 goes through 2 half-lives, then how much is left?
FINDING THE MASS If I 20g of Chlorine-39 goes through 3 half-lives, then how much is left?
FINDING THE MASS If I 32g of iodine-130 goes through 4 half-lives, then how much is left?