Answer:
The first energy level is closest to the nucleus. The second energy level is a little farther away than the first. ... The electrons in the energy level farthest from the nucleus are called valence electrons. Atoms in the same column (group) in the periodic table have the same number of valence electrons.
Explanation:
Answer:
The wavelength at which maximum absorbance will be seen is 496.6 nm.
Explanation:
The energy difference between the HOMO and LUMO =E = 2.50 eV
The wavelength at which maximum absorbance will be observed is related to energy of the difference of the HOMO and LUMO.
E = energy of photon of related to wavelength
h = Planck's constant =
c = speed of light =
= wavelength = ?
E = 2.50 eV =
The wavelength at which maximum absorbance will be seen is 496.6 nm.
<span>This type of reaction is called a synthesis reaction. This type of reaction occurs when two or more components combine to form a single compound. During this formation, heat and energy is released, ergo it is an exothermic type of reaction.</span>
I believe it is balanced forces!
Answer:
Nitrobenzene < Bromobenzene < Benzene < Phenol
Explanation:
Aromatic compounds undergo electrophilic aromatic substitution reaction in the presence of relevant electrophiles. Certain substituents tend to increase or decrease the tendency of an aromatic compound towards electrophilic aromatic substitution reaction.
Substituents that increase the electron density around the ring such as in phenol tends to make the ring more reactive towards electrophilic substitution. Halogens such as bromine has a -I inductive effect as well as a +M mesomeric effect.
However the -I(electron withdrawing effect) of the halogens supersedes the +M electron donation due to mesomeric effect.
Putting all these together, the order of increasing reactivity of the compounds towards electrophilic aromatic substitution is;
Nitrobenzene < Bromobenzene < Benzene < Phenol