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makvit [3.9K]
3 years ago
9

1. What trends do you see when considering total electrons, valence electrons (highest occupied energy level/outermost level ele

ctrons), periods, sublevels, blocks, and groups/ families?
Chemistry
2 answers:
NNADVOKAT [17]3 years ago
6 0
ELECTRON CONFIGURATION

Highest occupied energy level of an element

equal to the period 
for example, the highest occupied energy level of He is 1, Be is 2, Al is 3, Ca is 4, and Sn is 5
insens350 [35]3 years ago
5 0

Explanation:

Elements in the same group have the same number of valence electrons. Across a period left to right number of valence shell electrons increases but in the group this trend remains same means number of valence shell electrons are constant.

The atomic radius is increases from top to bottom in the group and decreases from left to right across a period.

Ionization enthalpy or energy increases across a period and decreases down the group. Ionization energy is the energy that requires to remove the outermost electron from the subshell.

Electronegativity decreases down the group because atomic number increases down the group and increases across a period.

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Draw the resonance structures for the conjugate base of Phenol (C6H6O). In one sentence, explain why phenol (C6H6O) has a pKa of
notsponge [240]

Answer:

The four resonance structures of the phenoxide ion are shown in the image attached

The conjugate base of cyclohexanol has only one resonance contributor, while

the conjugate base of phenol has four resonance contributors.

Explanation:

In organic chemistry, it is known that structures are more stable if they possess more resonance contributors. The greater the number of contributing canonical structures, the more stable the organic specie. Since the phenoxide ion has four contributing canonical structures, it is quite much more stable than cyclohexanol having only one contributing structure to its conjugate base. Hence the PKa(acid dissociation constant) of phenol is lesser than that of cyclohexanol. The conjugate base of phenol is stabilized by resonance.

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3 years ago
Suggest the pH of the solution made when potassium oxide dissolves in water.
Varvara68 [4.7K]

Answer:

Since KOH is a strong base, the solution completely ionizes into K+ and OH- when in water. The reaction KOH --> K+ + OH- takes place. The concentration of [ OH- ] can then be used to calculate the pOH of the solution. pH = 14 - pOH = 14 - 1.48 = 12.52

Explanation:

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2 years ago
Read 2 more answers
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3 years ago
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Answer:

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Explanation:

We can solve this problem by keeping in mind<em> Dalton's law of partial pressures</em>, which states that the total pressure of a mixture of gases is equal to the sum of each gas' partial pressures. In other words, for this case:

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