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PURDUE CHEM 115 FINAL FALL23 with 100% correct answers $15.49   Add to cart

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PURDUE CHEM 115 FINAL FALL23 with 100% correct answers

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  • Purdue Chm 115
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  • Purdue Chm 115

PURDUE CHEM 115 FINAL FALL23 with 100% correct answers

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  • September 27, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Purdue Chm 115
  • Purdue Chm 115
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PURDUE CHEM 115 FINAL FALL23

sig fig rules - correct answer ✔✔significant = nonzero, trapper zeros, trailing zeros IF there's a decimal
point

Mult/div = least # of sig figs

add/sub = least # of decimal places



law of conservation of mass - correct answer ✔✔atoms are not created or destroyed in a chemical
reaction



isotope - correct answer ✔✔atoms of the same element with a different number of neutrons and
therefore a different mass number



atomic mass of an element is... - correct answer ✔✔a weighted average of the masses of its isotopes



atomic structure - correct answer ✔✔dense positive nucleus, outer shell of electrons



groups and periods - correct answer ✔✔group = horizontal column

period = vertical row



limiting reactant - correct answer ✔✔the substance that controls the quantity of product that can form
in a chemical reaction



chemical vs nuclear reactions - correct answer ✔✔atoms in nuclear reactions change identity, involve
protons and neutrons, have an energy change, and are not affected by temp, catalysts, etc



nucleon - correct answer ✔✔protons and neutrons



nuclide - correct answer ✔✔nucleus with a particular composition

, spontaneous decay - correct answer ✔✔no collisions, alpha, beta, electron capture



induced reaction - correct answer ✔✔fission, fusion



penetrating power of radiation - correct answer ✔✔(low to high) alpha, beta, photon (y), neutron



when balancing nuclear reactions... - correct answer ✔✔conserve mass number and atomic number
(top = top, bottom = bottom)



more neutrons than protons... - correct answer ✔✔beta decay



more protons than neutrons... - correct answer ✔✔positron decay or electron capture



above the band of stability (atomic number > 83) - correct answer ✔✔alpha decay



band of stability chart - correct answer ✔✔above band B- decay, beyond band alpha decay, below band
B+ emission and e- capture



alpha emission - correct answer ✔✔helium-4 nucleus

+4 mass, +2 atomic number



beta emission - correct answer ✔✔electron, B- or positron, B+

+/- 1 atomic number



electron capture - correct answer ✔✔e-

-1 atomic number



photon (y) / gamma - correct answer ✔✔no effect on charge or mass

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