CHEMISTRY COLLEGE

Write the condensed ground-state electron configurations of these transition metal ions, and state which are paramagnetic:(a) V³⁺ (b) Cd²⁺ (c) Co³⁺ (d) Ag⁺

Answers

Answer 1

Answer:

Answer and Explanation :

Paramagnetic are those which has unpaired electrons and diamagnetic are those in which all electrons are paired.

(a) V³⁺

The electronic configuration is -

$[Ar]3d^1$

The electrons in 3d orbital = 1 (Unpaired)

Thus, the ion is paramagnetic as the electrons are unpaired.

(b) Cd²⁺

The electronic configuration is -

$[Kr]4d^(10)$

The electrons in 4d orbital = 10 (paired)

Thus, the ion is diamagnetic as the electrons are paired.

The electronic configuration is -

$[Ar]3d^6$

The electrons in 3d orbital = 6 (Unpaired)

Thus, the ion is paramagnetic as the electrons are unpaired.

(d) Ag⁺

The electronic configuration is -

$[Kr]4d^(10)$

The electrons in 4d orbital = 10 (paired)

Thus, the ion is diamagnetic as the electrons are paired.

Related Questions

What is the pOH of a 7.9 x 10 ^-4 M OH- solution? pOH= ?
What will be the theoretical yield of tungsten(is) ,W, if 45.0 g of WO3 combines as completely as possible with 1.50 g of H2
Which enzymes show very broad substrate specificity and can therefore be used to produce several higher alcohols.Select one:a. 2-keto acid decarboxylase AND alcohol dehydrogenase b. alcohol dehydrogenasec. transaminased. acetolactate synthasee. 2-ketoacid decarboxylase
A first-order decomposition reaction has a rate constant of 0.00140 yr−1. How long does it take for [reactant] to reach 12.5% of its original value? Be sure to report your answer to the correct number of significant figures.
lowly add a slight excess of concentrated (12 M) HCl to your aqueous solution until the pH of the solution is acidic as measured by pH paper.

A food is initially at a moisture content of 90% dry basis. Calculate the moisture content in wet basis

Answers

Answer:

Moisture content in wet basis = 47.4 %

Explanation:

Moisture content expresses the amount of water present in a moist sample.Dry basis and wet basis are widely used to express moisture content.

The next equation express the moisture content in wet basis:

$MC_(wb)=(MC_(db))/(1+MC_(db))$

where, $MC_(wb)$ : moisture content in wet basis and

$MC_(db)$ : moisture content in dry basis

We now calculate the moisture content in wet basis:

$MC_(wb)=(MC_(db))/(1+MC_(db))$

$MC_(wb)=(0.90)/(1+0.90)$

$MC_(wb)$ = 0.474 = 47.4 % wet basis

Have a nice day!

Classify each of the following chemical reactions as a synthesis decomposition and single displacement or double displacement reaction

Answers

1. Synthesis reaction : there is only 1 product formed from 2 or more reactant

E.g:

$H_2(g)+N_2(g)\text{ }\Rightarrow2NH_3(g)\text{ }$

2. Decomposition : reaction that occurs in presence of UV light and only 1 reactant that decomposes into 2 or more products.

E.g:

$CH_3Br(g)+UV_(light)\Rightarrow CH_3(g)\text{ + Br (g)}$

3. Single displacement :reaction that occurs when 1 reactant displaces other reactant from its compound:

E.g:

$Zn(s)+CoCl_2(aq)\text{ }\Rightarrow ZnCl_2(aq)\text{ + Co(s)}$

4. Double displacement :reaction that occurs when both reactant displaces each other.

E.g :

$K_2S(aq)+Co(NO_3)_2\Rightarrow2KNO_3(aq)\text{ + }CoS(s)\text{ }$

Which element has the LARGEST atomic radius?
Be
Ca
Ba
Sr

Answers

Answer:

none

Explanation:

it's Fr. which is francium.

Explanation:

An atomic radius is defined to be one-half the distance between the nuclei of two atoms, assuming a spherical atom since, according to the quantum mechanical model of the atom, electrons are located within a probability cloud surrounding the nucleus which has no sharp boundary.

Notice that, in general, there are two main trends of atomic radii in the Periodic Table of Elements.

The first trend illustrates that atomic radii increase when going down a group in the periodic table. This is because when moving downwards in a group, every subsequent atom gains an additional principal energy level, which leads to electron shielding. Electron shielding refers to the decreased attraction between the electrons that occupy the higher principal energy level and the nucleus of the atom due to the shielding of electrons in the lower principal energy level.

The second trend outlines that atomic radii decrease when going across the period from left to right. For elements within a period, individual electrons occupy the same principal energy level. Likewise, when an electron is added, a new proton is also added to the nucleus, providing the nucleus with a stronger positive charge and hence leading to a higher effective nuclear charge. This increase in nuclear attraction pulls the electrons closer towards the nucleus, leading to a decrease in atomic radius.

Therefore, given the option between beryllium, calcium, barium, and strontium, the element with the largest atomic radius is barium since all the elements given are in Group II, however, barium is the element furthest down the group and therefore have electrons occupying the highest principal energy level compared to other elements.

The air temperature surrounding a snowy driveway is 0ºC. One side of the driveway is shaded, while the other side is sunny. The snow on the sunny side melts. Which statement is true? The snow absorbed chemical energy to produce a chemical change. The snow absorbed heat energy to produce a chemical change. The snow released heat energy to produce a physical change. The snow absorbed radiant energy to produce a physical change.

Answers

Energy conversion can alter the state of matter by the release or absorption of energy. The snow on the driveway absorbed radiant energy to produce a physical change. Thus, option D is correct.

What is a physical change?

A physical change is a temporary change that is for a shorter duration of time and has been reversible as now new substance formation takes place. Instead, the old substance undergoes a change in the state of matter.

Snow is a solid state that absorbs radiant heat from the sun to get converted into water by melting. The melting of snow is a physical change as the state of matter gets altered by the absorption of energy. No chemical composition or properties were altered.

Therefore, option D. the melting of snow is a physical change.

Learn more about physical change, here:

brainly.com/question/15515993

#SPJ6

Answer:

The snow absorbed radiant energy to produce a physical change.

Explanation:

A 2.00 L container of gas has a pressure of 1.00 atm at 300 K. The temperature of the gas is halved to 150K, and the measured pressure of the same 2.00 Liter sample is 0.420 atm. Which of the following is the best explanation for these observations? A. Pressure is proportional to temperature for a fixed volume of gas. B. The molecules of the gas occupy a significant portion of the volume. C. The molecules of the gas have negligible volume of their own. D. The molecules have significant attractive forces at 150 K. E. The gas is closer to an ideal gas at 150 K.

Answers

The best explanation for the observation is that, the Pressure is proportional to temperature for a fixed volume of gas. (Option A)

From the question given above, the following data were obtained:

Initial volume (V₁) = 2 L

Initial pressure (P₁) = 1 atm

Initial temperature (T₁) = 300 K

Final temperature (T₂) = 150 K

Final volume (V₂) = 2 L = constant

Final pressure (P₂) = 0.420 atm

From the above, we can see that the volume is constant.

Applying the combine gas equation, we can conclude as follow:

P₁V₁ / T₁ = P₂V₂ / T₂

V₁ = V₂

P₁ / T₁ = P₂ / T₂

P/T = constant

P = constant × T

Thus, we can conclude that the pressure is proportional to the temperature at constant volume. This simply implies that the pressure will increase if the temperature increase and it will also decrease if the temperature decreases.

The correct answer to the question is Option A.

Learn more about gas laws: brainly.com/question/9631148

Answer:

Explanation:

PV=nRT

PV/nT

V/T -> (1)/(300)=(x)/(150)

x=.420

The balanced equation below shows the products that are formed when pentane (C5H12) is combusted.C5H12 + 802 → 10CO2 + 6H20
What is the mole ratio of oxygen to pentane?