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Notes on video lecture:
Nuclear Synthesis: The Origins of Elements in Our Solar System
Choose from these words to fill the blanks below:
neutrons, all, volatile, 1967, combine, standard, atomic, mass, helium, chondrites, isotopes, barrier, binding, Stellar, uranium, Lithium, noble, Helium, nucleus, vary, occur, synthesis, composition
nuclear                    models come from three separate lines of evidence
1. composition of our solar system
the elemental abundances we have in the solar system
the most important of the three type of evidence
the              structure of atoms
nucleus
protons
                
electrons
an element's character is defined by the number of protons in the               
the number of protons is matched by the number of electrons
neutrons add          but do not determine properties
can vary and gives us a number of set                 
Beryllium example
four protons, are set in number
five neutrons, can          in number
periodic table
gives no indication of how often they            in the universe
hydrogen and              make up about 99% of the elements that occur in the universe
least abundant is               
the nucleus synthetic models have to explain this relative abundance
how do we know this abundance
1. meteorites
                    
the most primitive meteorite
used to represent the bulk                        of the Solar System
not so representative for            gases (helium, neon, argon, krypton, xenon, and radioactive radon) and some                  elements
how were the elements formed
Big-Bang nucleosynthesis
         Nobel Prize in physics
               nucleosynthesis
became the                  model which we use today
1983 Nobel Prize in physics
3 categories of nucleic production
1. Big Bang products: Hydrogen, Helium, minor               , Boron, and Beryllium
all formed in the Big Bang
created in the instant that the universe formed
in the first instant you would only have protons and neutrons which begin to               
mainly hydrogen and helium
but the Big Bang theory suggested that        the elements were form this way
it turns out that there is a fundamental                that exists at lithium and Baryllium
e.g. as you add another proton to Lithium, you come down to              again, which is where Stellar explanation accounts for the elements heavier than lithium
2. Stellar fusion products
Lithium, Iron, Cobal, Nickel
everything up to iron-56 combines in fusion reactions
fusion cannot continue beyond iron-56 because you get lower                forces after that
3. products of P, S, and R-nucleosynthesis related to stars and supernovae
2. experiments on nuclear reactions under set conditions in the laboratory
3. theoretical constraints on possible sites or environments for nuclear synthetic reactions which are imagined within the laboratory
Examining the Agpalilik Meteorite
Nuclear Synthesis: The Origins of Elements in Our Solar System
The Origin of Solar Systems