Have you had a caffeine fix today? Have you had a caffeine fix today? The universe, atoms & molecules, in a cup of coffee…. or tea.
FUNDAMENTAL PARTICLES: FUNDAMENTAL PARTICLES: Mass Charge Symbol Nucleus: PROTON 1 amu +1 H+, H, p NEUTRON 1 amu 0 n _________________________________________ ELECTRON very small -1 e - This particle is said to “hold” or “bond” atoms together in molecules.
Atoms (neutral electrostatic charge: # protons = # electrons ) - # Protons = Atomic Number
- Atomic Mass = # Protons + # of Neutrons
- Isotope: same atomic number but different atomic mass (different # of neutrons)
Atomic Number = 6 (atom’s identity) - Atomic Number = 6 (atom’s identity)
- Carbon
- Atomic Mass = 13 (isotope 13)
- 6 protons; # neutrons = 13 - 6
- neutral atom has 6 electrons
Isotopes vary in their relative natural abundance. - Isotopes vary in their relative natural abundance.
- Periodic Table’s atomic mass is a weighted average of all isotopic masses
- The mass of sodium, Na, element #11 is listed as 22.99 amu. Which isotope is naturally present in the larger amount: the isotope with 12 neutrons or with 13 neutrons? (There is a small percentage of the isotope with 11 neutrons.)
Emitted Particles: alpha particle 4 amu +2 beta particle very small -1 gamma very very small 0
President Truman / Hiroshima - President Truman / Hiroshima
Hiroshima, Japan
Fusion too has been used in producing weapons (“hydrogen” bombs) and has not yet found a peaceful commercial application Fusion too has been used in producing weapons (“hydrogen” bombs) and has not yet found a peaceful commercial application
History of nuclear tests & explosions History of nuclear tests & explosions
Course/ Lab Manual pg. 27-30) Course/ Lab Manual pg. 27-30) DUE before Exam 1, Week 6
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