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Packet 9: Bonus 17

The Born–Oppenheimer approximation treats these objects as stationary relative to the motion of electrons. For 10 points each:
[10e] Name these very dense objects found at the center of an atom.
ANSWER: atomic nuclei [or atomic nucleus]
[10h] Maria Goeppert Mayer proposed the shell model of the nucleus, which explains why nuclei are especially stable at these values. Calcium-48 is extremely long lived due to having 20 protons and 28 neutrons, both of which are these values.
ANSWER: magic numbers [accept doubly-magic]
[10m] In this process, a nucleus decays by emitting an electron or positron, changing the atomic number by one. Wolfgang Pauli proposed the neutrino to explain where extra energy is carried during this form of decay.
ANSWER: beta decay [accept beta-plus or beta-minus decay]
<Chemistry — June Yin> | SHOW-ME Four Packet 9

HeardPPBE %M %H %
2417.0896%58%17%

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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
ColdwaterNew Buffalo A1001020EM
Detroit Country Day AU of D Jesuit100010E
Detroit Country Day BWhite Cloud B100010E
Hillsdale Academy AWilliamston100010E
Hillsdale Academy BTraverse City Central B100010E
Hillsdale Academy DDeWitt A100010E
HoltNew Boston Huron1001020EM
New Buffalo BRockford B100010E
Okemos ADetroit Catholic Central C1001020EM
Okemos BTroy B1001020EM
Rockford ADeWitt B100010E
TaylorHillsdale Academy C0000
Traverse City Central ADetroit Catholic Central A100010E
Troy AGrand Ledge1001020EM
Utica AcademyDetroit Catholic Central B1001020EM
White Cloud AChelsea1001020EM

Summary

TournamentEditionMatchHeardPPBE %M %H %
Rube Goldberg XIX11/20/2025✓1613.7594%44%0%
SHOW-ME Four Nationwide HS11/20/2025✓528.00100%100%80%
SPOOKY IX11/20/2025✓316.67100%67%0%