What is the threshold frequency for sodium metal if a photon with frequency 6.66 × 10 14 s − 1 ejects an electron with 7.74 × 10 − 20 J kinetic energy? Will the photoelectric effect be observed if sodium is exposed to orange light?
What is the threshold frequency for sodium metal if a photon with frequency 6.66 × 10 14 s − 1 ejects an electron with 7.74 × 10 − 20 J kinetic energy? Will the photoelectric effect be observed if sodium is exposed to orange light?
What is the threshold frequency for sodium metal if a photon with frequency
6.66
×
10
14
s
−
1
ejects an electron with
7.74
×
10
−
20
J kinetic energy? Will the photoelectric effect be observed if sodium is exposed to orange light?
Definition Definition Phenomenon in which a substance absorbs electromagnetic radiation and electrically charged particles are emitted from or inside it.
Q4: Rank the relative nucleophilicity of halide ions in water solution and DMF solution,
respectively.
F CI
Br |
Q5: Determine which of the substrates will and will not react with NaSCH3 in an SN2 reaction to
have a reasonable yield of product.
NH2
Br
Br
Br
OH
Br
Q7: Rank the following groups in order of basicity, nucleophilicity, and leaving group ability.
a) H₂O, OH, CH3COOT
b) NH3, H₂O, H₂S
Q8: Rank the following compounds in order of increasing reactivity in a nucleophilic substitution
reaction with CN as the nucleophile.
Br
A
B
NH2
LL
F
C
D
OH
CI
LLI
E
Q9: Complete the missing entities for following reactions (e.g., major product(s), reactants,
and/or solvents) for the SN2 reactions to occur efficiently. Include curved-arrow mechanism for
reactions a) to d).
a)
H
"Cl
D
+
-OCH 3
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