1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
miskamm [114]
3 years ago
7

Using the equation zeff=z−s and assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screen

ing constant, s, calculate zeff for the 2p electrons in both ions
Physics
2 answers:
aleksklad [387]3 years ago
7 0

The estimated effective nuclear charge experienced by a 2p electron of chlorine is \boxed{\text{7}}.

Further Explanation:

Effective Nuclear Charge:

It is the charge experienced by the outermost valence electrons of any many-electron atom. This is done by considering the number of shielding electrons that are present around the nucleus.

Slater’s Rule:

It is used to evaluate the effective nuclear charge experienced by an electron in the many-electron atom. According to this rule, the actual nuclear charge experienced by an electron is less than the actual nuclear charge due to screening by the other electrons present in the atom.

The electronic configuration is the distribution of electrons of an atom in the atomic orbitals.

The effective nuclear charge is calculated as follows:

{Z_{{\text{eff}}}} = Z - s                 ......(1)

Here,  

Z is the actual nuclear charge.

S is the screening constant.

In KCl compound, two ions are {{\text{K}}^ + } and {\text{C}}{{\text{l}}^ - }.

For {{\text{K}}^{\text{ + }}} ion,

The atomic number of potassium is 19. So its electronic configuration is \left( {1{s^2}} \right)\left( {2{s^2}2{p^6}} \right)\left( {3{s^2}3{p^6}} \right)\left( {4{s^1}} \right). For 2p orbital, outer shell electrons does not affects the inner shell electrons so the electrons in 3s, 3p, and 4s orbital can be neglected in order to calculate the {Z_{{\text{eff}}}} on a 2p electron. Thus the core electrons in {{\text{K}}^ + } ion are 2 and valance electrons are 8.

Since core electrons contribute 1.00 and valance electrons contribute 0.00 thus the formula to calculate the screening constant for a 2p electron is as follows:

s = \left[ {\left( {1.00} \right)\left( {{\text{Number of core electrons}}} \right) + \left( {0.00} \right)\left( {{\text{Number of valence electrons}}} \right)} \right]               ......(2)

Substitute 2 for the number of core electrons and 2 for the number of valence electrons in equation (2).

\begin{aligned}s&= \left[{\left({1.00}\right)\left( {\text{2}}\right)+\left( {0.00}\right)\left( {\text{8}}\right)} \right]\\&= 2\\\end{aligned}

Substitute 19 for Z and 2 for s in equation (1) to calculate the effective nuclear charge for a 2p electron in {{\text{K}}^ + } ion.

\begin{aligned}{Z_{{\text{eff}}}}&=19 - 2\\ &= 17\\\end{aligned}

So the estimated effective nuclear charge experienced by a 2p electron of {{\mathbf{K}}^{\mathbf{ + }}} ion is 17.

For {\text{C}}{{\text{l}}^ - } ion,

The atomic number of chlorine is 17. So its electronic configuration is \left( {1{s^2}} \right)\left( {2{s^2}2{p^6}} \right)\left( {3{s^2}3{p^5}} \right). For 2p orbital, outer shell electrons does not affects the inner shell electrons so the electrons in 3s and 3p orbital can be neglected in order to calculate the {Z_{{\text{eff}}}} on a 2p electron. Thus the core electrons in {\text{C}}{{\text{l}}^ - } ion are 2 and valance electrons are 8.

Substitute 2 for the number of core electrons and 2 for the number of valence electrons in equation (2).

\begin{aligned}s&= \left[{\left({1.00}\right)\left( {\text{2}}\right) + \left( {0.00}\right)\left({\text{8}}\right)} \right]\\&= 2\\\end{aligned}

Substitute 17 for Z and 2 for s in equation (1) to calculate the effective nuclear charge for a 2p electron.

\begin{aligned}{Z_{{\text{eff}}}}&= 17 - 2\\&=15\\\end{aligned}

So the estimated effective nuclear charge experienced by a 2p electron of chlorine is 15.

Learn more:

1. Calculation of the mass of 1 mole of viruses? brainly.com/question/8353774

2. Determine the moles of water produced: brainly.com/question/1405182

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Periodic properties of elements

Keywords: Slater’s rule, 2p electron, effective nuclear charge, chlorine, potassium, Cl-, K+, electronic configuration, 17, 19 and atomic number.

DIA [1.3K]3 years ago
5 0
Thank you for posting your question here at brainly. Below is the solution. I hope the answer will help. 

<span>Cl^- 1s^2 2s^2p^6 3s^2 3p^6 1s^2 2s^2p^6 S = 10; 3s^2 3p^6 S = 0 </span>
<span>Zeff = Z-S = 17- 10 =7 </span>
<span>K^+ 1s^2 2s^2p^6 3s^2 3p^6; 1s^2 2s^2p^6 S = 10; 3s^2 3p^6 S = 0 </span>
<span>Zeff = Z-S = 19- 10 = 9 
</span>
S = 2 + 6.8 + 2.45 = 11.25 
<span>Zeff(Cl^-) = 17 – 11.25 = 5.75 </span>
<span>K^+ 1s^2 2s^2p^6 3s^2 3p^6 same S as for Cl^- but Z increases by 2 hence </span>
<span>Zeff(K^+) = 19 - 11.25 = 7.75</span>
You might be interested in
The current that charges a capacitor transfers energy that is stored in the capacitor’s electric field. Consider a 2.0 μF capaci
lapo4ka [179]

Answer:

the capacitor voltage is V = 20 V

Explanation:

Given,

Capacitance of the capacitor =  2.0 μF

energy stored = 200 W

time (t) =2.0 μs

Capacitor voltage = ?

\dfrac{dE}{dt}=200 W

E =200\times 2 \times 10^{-6}

E =400 \times 10^{-6}\ J

we know,

E = \dfrac{1}{2}CV^2

V =\sqrt{\dfrac{2E}{C}}

V =\sqrt{\dfrac{2\times 400 \times 10^{-6}}{2\times 10^{-6}}}

V =\sqrt{400}

V = 20 V

so , the capacitor voltage is V = 20 V

7 0
3 years ago
An ideal gas, initially at a pressure of 11.2 atm and a temperature of 299 K, is allowed to expand adiabatically until its volum
Tju [1.3M]

Answer:

The pressure is  P_2  =  4.25 \ a.t.m

Explanation:

From the question we are told that

   The initial pressure is P_1  =  11.2\ a.t.m

   The  temperature is  T_1 =   299 \ K

   

Let the first volume be  V_1 Then the final volume will be  2 V_1

 Generally for a diatomic  gas

           P_1 V_1 ^r  =  P_2  V_2  ^r

Here r is the radius of the molecules which is  mathematically represented as

    r =  \frac{C_p}{C_v}

Where C_p \  and\   C_v are the molar specific heat of a gas at constant pressure and  the molar specific heat of a gas at constant volume with values

     C_p=7 \  and\   C_v=5

=>   r =  \frac{7}{5}

=>  11.2*( V_1 ^{\frac{7}{5} } ) =  P_2  *  (2 V_1 ^{\frac{7}{5} } )

=>   P_2  =  [\frac{1}{2} ]^{\frac{7}{5} } * 11.2

=>  P_2  =  4.25 \ a.t.m

8 0
3 years ago
Where does the majority of the mass of an atom come from
asambeis [7]

Answer:

The Nucleus

Explanation:

The nucleus contains the majority of an atom's mass because protons and neutrons are much heavier than electrons, whereas electrons occupy almost all of an atom's volume.  I hope this helps you :D

5 0
2 years ago
Read 2 more answers
Describe the difference between distance, position, and displacement
nata0808 [166]

Answer:

Explanation:

<em>Position is the location of the object (whether it's a person, a ball, or a particle) at a given moment in time.</em>

<em>Displacement is the difference in the object's position from one time to another.</em>

<em>Distance is the total amount the object has traveled in a certain period of time.</em>

<em />

<em>I hope this helps!</em>

<em />

5 0
2 years ago
As an object rolls downhill, some of the energy is
Charra [1.4K]
When the object is at the top of the hill it has the most potential energy. If it is sitting still, it has no kinetic energy. As the object begins to roll down the hill, it loses potential energy, but gains kinetic energy. The potential energy of the position of the object at the top of the hill is getting converted into kinetic energy. Hope this helped. :)


7 0
3 years ago
Read 2 more answers
Other questions:
  • Where f is force, m is mass, v is velocity, and t is duration of impact, what other information do you need in order to determin
    7·1 answer
  • When you walk at an average speed (constant speed, no acceleration) of 20.7 m/s in 75.8 sec you will cover a distance of______?
    6·1 answer
  • You are wearing earbuds or headphones to listen to your music but your family members can hear it as well. They tell you that it
    8·1 answer
  • What did the moon of Titan contain that is of interest to scientists?
    13·2 answers
  • Is semic a mechanical wave
    5·1 answer
  • How is this please help me​
    5·1 answer
  • (ii) Electromagnetic waves transfer energy.
    9·1 answer
  • Two male rabbits live in a habitat together. They both compete for mates and territory during the spring months. This is an exam
    14·2 answers
  • A brightfield microscope equipped with a ____________ ___________ stop is able to block light from the illuminator creating brig
    13·1 answer
  • Bonds: Including Carbon Compounds Quick Check
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!