Exam (elaborations)
CHEM 231 Exam 1 Questions And Answers Latest Update
- Course
- CHEM 231
- Institution
- University Of Illinois - Urbana-Champaign
CHEM 231 Exam 1 Questions And Answers Latest Update
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Solution 2024/2025Pepper
CHEM 231 Exam 1 Questions And Answers
Latest Update
Ionic ANS✔✔ Formal e- transfer,
ΔEN ≥ 2.0
Covalent ANS✔✔ e- equally shared (such as in a bonding pair/bond)
ΔEN ≤ 0.4
Polar Covalent ANS✔✔ uneven sharing (δ+ ↦ δ-)
electrons being pulled to δ- (moving density)
0.4 ≤ΔEN ≤ 2.0
Constructive interference ANS✔✔ σ bonding (1s & 1s, 1s & sp, 1s &sp2, 1s
&sp3, sp & sp)
same waves add together to increase in amplitude
Destructive interference ANS✔✔ σ* antibonding
sp ANS✔✔ 2 EPG,
180°, linear
50% s 50%p shortest bond length
sp2 ANS✔✔ 3 EPG
, Solution 2024/2025
Pepper
120°, trigonal planar
33% s 66% p
sp3 ANS✔✔ 4 EPG
109.5°, tetrahedral
25% s 75% p longest bond length
alkanes ANS✔✔
alkenes ANS✔✔
alkynes ANS✔✔
meth ANS✔✔ 1
eth ANS✔✔ 2
prop ANS✔✔ 3
but ANS✔✔ 4
pent ANS✔✔ 5
hex ANS✔✔ 6
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