Chapter 3 Slides

Chapter 3 Slides - TAPPS (3 pts) Question: The new element...

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TAPPS (3 pts) Question: The new element Eichlerium was recently discovered, and was found to be comprised of the isotopes Eichlerium-275 and Eichlerium-277. If the atomic number of Eichlerium is 125, how many neutrons are in the Eichlerium-275 nucleus? a) 125 b) 150 c) 152 d) 275 e) 277
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TAPPS (3 pts) Question: The new element Eichlerium was recently discovered, and was found to be comprised of the isotopes Eichlerium-275 and Eichlerium-277. If the isotope with a mass of 275.0 amu is 75.00% abundant, and the isotope with a mass of 277.0 amu is 25.00% abundant, what is the average atomic mass of Eichlerium? a) 275.0 b) 276.0 c) 277.0 d) 275.5 e) 265.5
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TAPPS Question: The new element Eichlerium was recently discovered, and was found to be comprised of the isotopes Eichlerium-275 and Eichlerium-277. If the isotope with a mass of 275.0 amu is 75.00% abundant, and the isotope with a mass of 277.0 amu is 25.00% abundant, what is the average atomic mass of Eichlerium? 275 x 0.75 = 206.25 + 277 x 0.25 = 69.25 275.5 amu
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Average Atomic Weight of Carbon Carbon-12 98.90% abundant Carbon-13 1.100% abundant 12.00 x 0.9890 = 11.868 + 13.00 x 0.01100 = 0.143 12.01 amu
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“What if you get scared half to death twice?” - Steven Wright
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How are electrons arranged in the atom (i.e., how do they move around the atom)? (1pt) a) electrons have discrete energies and move around the nucleus in “orbits,” similar to how planets move around the sun. b) we can’t physically see electrons with any experiment, but we have a mathematical model that says electrons are discretely located in differently shaped regions of space called orbitals. c) we have a mathematical model that gives us the probable location of atoms in differently shaped regions called orbitals, and we have indirect experimental evidence that confirms this mathematical model; we ultimately never know for sure how electrons move around the atom though because of their wave properties. d) electrons are actually not particles, so we cannot say how they move around the atom.
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Electronic Structure 1. How are electrons “arranged” around the nucleus (what is the electronic structure of the atom)? 3. What is the physical nature of electrons, and how do electronic properties impact the way we describe electronic structure? 4.
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Chapter 3 Slides - TAPPS (3 pts) Question: The new element...

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