Answer:
Really sorry I don't know answer
B the color of the metal . Hope this helps
The wavelength of a wave refers to the horizontal distance that is travelled by a wave.
<h3>What is wavelength?</h3>
The wavelength of a wave is given by the formula;
v =λf
f = v/λ
Substituting the values;
f = 3 * 10^8 m/s/410 * 10^-9 m
f = 7.3 * 10^14 Hz
for 2
f = 3 * 10^8 m/s/434 * 10^-9 m
f = 6.9 * 10^14 Hz
for 3
f = 3 * 10^8 m/s/486 * 10^-9 m
f = 6.2 * 10^14 Hz
for 4
f = 3 * 10^8 m/s/657 * 10^-9 m
f = 4.6 * 10^14 Hz
Learn more about wavelength:brainly.com/question/13533093
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Answer:
has higher boiling point
Explanation:
has higher boiling point because in , 
has a very strong dipole and we know that whenever there is dipole-dipole interaction then boiling point increases. On the other hand in 
the NO group has not so strong dipole which weakens its boiling point
So the boiling point of is higher than the boiling point of
