mini quiz- half sheet h = 1.01 g/ mol , o = 16.00 g/ mol s = 32.07 g/ mol , n = 14.01 g/ mol , i...
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Mini Quiz- Half Sheet H = 1.01 g/ mol , O = 16.00 g/ mol S = 32.07 g/ mol , N = 14.01 g/ mol , I = 126.90 g/ mol. How many grams in 3.4 x 10 23 molecules of H 2 SO 4 ? 2. How many molecules are there in 0.40 g of N 2 I 6 ?. Nuclear Chemistry. Unstable Nuclei. - PowerPoint PPT PresentationTRANSCRIPT
Mini Quiz- Half SheetH = 1.01 g/mol, O = 16.00 g/mol
S = 32.07 g/mol, N = 14.01 g/mol, I = 126.90 g/mol
1. How many grams in 3.4 x 1023 molecules of H2SO4?
2. How many molecules are there in 0.40 g of N2I6?
Nuclear Chemistry
Unstable Nuclei
Often nuclei of very large atoms are unstable…
Unstable Nuclei Stable Nuclei + Energy
Cause of InstabilityA p+ to no ratio that is not close to 1:1
Example: Polonium (Po) has 84 protons and 125 neutrons
Radioactive
Oxygen has 8 protons and 8 neutronsNot Radioactive
Nuclear Reaction
• Reaction that affects the nucleus of an atom.• Radioactive decay: Spontaneous disintegration
of a nucleus into a slight lighter nucleus.• Particles and energy can be emitted.• This is called nuclear radiation
92-Uranium-238
• 92 protons and 146 neutrons
• Radioactive nuclide• Undergoes a series of
radioactive decay
3 Main types of radioactive decay
• Alpha• Beta• Gamma
Alpha Particle
• Nucleus of a Helium atom• 2 p+ and 2 no
• Mass = 4, Atomic number = 2
Beta Particle
• neutron to proton ratio that is too high
• Mass = 0, number -1
Gamma Radiation
• High energy electromagnetic waves (light)• No mass• Pure energy
g
Radiation Exposure
Balancing Nuclear Equations
212-4 = 208 mass of new element84-2 = 82 atomic number of new element
Balancing Nuclear Equations
Uses for Nuclear Radiation
Uses for Nuclear Radiation
Uses for Nuclear Radiation
Nuclear Fission• Heavy nuclei splits into more stable nuclei• Releases enormous amount of energy
Nuclear Reactors
Nuclear Fusion2 small nuclei form a larger nuclei, producing a crazy amount of energy.
Warm Up
What is the difference between nuclear fission and fusion?
Nuclear Reactors
Nuclear Fusion2 small nuclei form a larger nuclei, producing a crazy amount of energy.
Questions on Vegium?
Check your calculations… do you have the right number of SF?
Check your Isotope WS
Do you have any questions on these calculations?
Work I’m Collecting
VegiumUnit 2 ReviewAtomic Structure WS- (3 worksheets on 1 sheet)Isotope WS