What accounts for the stability of an electron in multi-electron atom?

What accounts for the stability of an electron in multi-electron atom?
by

1 Answer

Answer :

Ans. i.The angular momentum of an electron is integral multiple of h/2ח
 ii. The symmetrical electron density of an orbit.
 iii.The maximum transition energy of an orbital.
by

Related questions

Tell what would happen to the stability of an atom, with atomic number higher than18, if the aufbau principle was not introduced.

Description : Tell what would happen to the stability of an atom, with atomic number higher than18, if the aufbau principle was not introduced.

Last Answer : Ans. We cannot find out the exact reason of stability of an atom & why they should have filled inner orbits before outermost shell.

Explain why half-filled orbitals have extra stability.

Description : Explain why half-filled orbitals have extra stability.

Last Answer : Ans. It has symmetrical electron density as well as greater exchange energy.

Is the energy of an electron in 2s orbital same as of that in 2p orbital? Why?

Description : Is the energy of an electron in 2s orbital same as of that in 2p orbital? Why?

Last Answer : Ans. No, the energy depends upon (n+l) values in an atom. Hence 2p orbital has greater energy than 2s.

What is Aufbau’s principle? How it helps to fill electrons in an atom in different orbitals?

Description : What is Aufbau’s principle? How it helps to fill electrons in an atom in different orbitals?

Last Answer : Ans Electrons are filled in orbitals of an atom according to increasing energies which is in accordance to (n+l) values of electrons. If (n+l )values are same the electron goes to orbital having lower value of n.

What do you mean by Pauli’e exclusive principle? What is its significance?

Description : What do you mean by Pauli’e exclusive principle? What is its significance?

Last Answer : Ans No two electrons will have same set of all q.no. If n,l,m are same i.e. same orbital ‘s’ will be differ. It shows that all electrons have a definite place in an atom or their own identity.

What is Hund’s rule of maximum multiplicity? What is its significance?

Description : What is Hund’s rule of maximum multiplicity? What is its significance?

Last Answer : Ans Pairing of electrons in an orbital takes place only when all orbitals of same sub-shell become singly occupied. It helps to equalize energy of a sub-shell

Explain the significance of spin quantum number.

Description : Explain the significance of spin quantum number.

Last Answer : Ans.The direction of spinning of an electron in an orbit as well as the net magnetic moment of an orbital.

How many of the following are possible: 1p, 2s, 3p, 3f, 3d.

Description : How many of the following are possible: 1p, 2s, 3p, 3f, 3d.

Last Answer : Ans.2s , 3p & 3d are possible.

Explain the significance of Azimuthal quantum number.

Description : Explain the significance of Azimuthal quantum number.

Last Answer : Ans. It refers as sub-energy level of an atom.

How many quantum numbers are needed to designate an orbital?

Description : How many quantum numbers are needed to designate an orbital?

Last Answer : Ans.Three quantum numbers.

“In reality all the s-orbitals are spherically symmetric.” What does this represent?

Description : “In reality all the s-orbitals are spherically symmetric.” What does this represent?

Last Answer : Ans. The probable density of an electron in s-orbital is equally distributed at all coordinates in space.

Why is s-orbital orbital considered non directional while p-orbital directional?

Description : Why is s-orbital orbital considered non directional while p-orbital directional?

Last Answer : Ans. Electron density in s-orbital is equal in all direction while it dumble shaped along one axis in p- orbitals.

Find the number of radial and angular nodes in 3d subshell?

Description : Find the number of radial and angular nodes in 3d subshell?

Last Answer : Ans. Zero-angular node as well as radial nodes.

How many maximum 3s electrons can have magnetic spin quantum number -1/2?

Description : How many maximum 3s electrons can have magnetic spin quantum number -1/2?

Last Answer : Ans. 1 electrons.

What are different types of quantum numbers , write them with their symbols ?

Description : What are different types of quantum numbers , write them with their symbols ?

Last Answer : Ans. 1.Principal Quantum Numbers (n) 2.Azimuthal Quantum Numbers(l) 3.Magnetic Quantum Numbers (m) 4.Spin Quantum Numbers(s)

Define Pauli’s exclusion principle ?

Description : Define Pauli’s exclusion principle ?

Last Answer : Ans. No two electrons in an atom can have same set ofall four quantum numbers. If three are same one Quantum number must have different value.

Give the points of Rutherford Model.

Description : Give the points of Rutherford Model.

Last Answer : Ans. 1. Atom is neutral. 2.Whole mass is concentrated in nucleus. 3.Electrons are revolving in orbits.

Write two properties which cannot be explain by wave nature of radiation

Description : Write two properties which cannot be explain by wave nature of radiation

Last Answer : Ans. 1.Photo electric effect 2. Black Body radiation

Write the draw back of Rutherford Atomic Model.

Description : Write the draw back of Rutherford Atomic Model.

Last Answer : Ans (1). He was unable to explain the stability of Atom. (2). He could not explain the line spectrum.

Why; e/m value is not constant for canal rays ?

Description : Why; e/m value is not constant for canal rays ?

Last Answer : Ans. Mass of particles of cathode rays is not constant.

What is threshold frequency?

Description : What is threshold frequency?

Last Answer : Ans –The minimum frequency required to eject out electron from an atom.

Name the spectral series which appear in the region of electromagnetic spectrum. (a) Visible region (b) UV region (c) Far IR region

Description : Name the spectral series which appear in the region of electromagnetic spectrum. (a) Visible region (b) UV region (c) Far IR region

Last Answer : Ans: (a) Balmer Series (b) Lymen Series (c) Pfund Series

What is the difference between Quantum and photon?

Description : What is the difference between Quantum and photon?

Last Answer : Ans. The smallest packet of Energy of any radiation is called as Quantum and that of Light is known as Photon.

State Heisenberg Uncertainty Principle.

Description : State Heisenberg Uncertainty Principle.

Last Answer : Ans. It is impossible to determine the exact position & exact momentum or velocity of microscopic particle.

The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl oxygen (c) the acidity of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion

Description : The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl ... of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion

Last Answer : the resonance stability associated with the carboxylate ion

A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells

Description : A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells

Last Answer : ANSWER: Z -- HAVE FILLED OUTER ELECTRON SHELLS

What is the electron configuration of an atom ?

Description : What is the electron configuration of an atom ?

Last Answer : The number of electrons in an atom is a unique number. The structure of which gives an idea of the properties of atoms. According to the laws of quantum mechanics, a certain number of electrons in an angle ... are as follows: (a) Pauli's Exclusion Principle ( b) Aufbau Principle ( c) Hund's Rule

(3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of the atom, the electron configuration determines how it will bond, with what it will bond, and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Description : (3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of ... , and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Last Answer : Methyl phenyl ether can be obtained by reacting - (1) phenolate ions and methyl iodide (2) methoxide ions and bromobenzene (3) methanol and phenol (4) bromobenzene and methyl bromide

(4) less soluble in blood than nitrogen at high pressure Explanation: Deep-sea divers have their oxygen supply mixed with helium in order to avoid the toxic nature of oxygen under extreme pressures. The Helium atom is much smaller than the Nitrogen molecule, has a smaller electron cloud and is less polarizable. It, therefore is less soluble in blood than nitrogen and prevents the formation of nitrogen bubbles in blood which blocks blood flow as the diver comes to the surface of the sea from underwater.

Description : (4) less soluble in blood than nitrogen at high pressure Explanation: Deep-sea divers have their oxygen supply mixed with helium in order to avoid the toxic nature of oxygen under extreme pressures. The ... blood which blocks blood flow as the diver comes to the surface of the sea from underwater.

Last Answer : The chemical bahaviour of an atom depends upon - (1) the number of protons in its nucleus (2) the number of neutrons in the nucleus (3) the number of electrons orbiting around the nucleus (4) the number of nucleons in the nucleus

The smallest particle of an element is called - (1) Ion (2) Electron (3) Atom (4) Molecule

Description : The smallest particle of an element is called - (1) Ion (2) Electron (3) Atom (4) Molecule

Last Answer : (3) Atom Explanation: An element is a substance completely made up of one atom. However, the atom itself is not the smallest known particle, but instead each atom is made up of three individual parts: electrons, protons and neutrons.

The total energy of revolving electron in an atom – (1) cannot be negative (2) can have any value above zero (3) can never be positive (4) will always be positive

Description : The total energy of revolving electron in an atom – (1) cannot be negative (2) can have any value above zero (3) can never be positive (4) will always be positive

Last Answer : (3) can never be positive Explanation: The total energy of a revolving electron in any orbit is the sum of its kinetic and potential energies. Energy of an electron at infinite distance from the ... and the energy of electron decreases and thus becomes negative. Thus, it can never be positive.

The fundamental particles present in the nucleus of an atom are - (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Description : The fundamental particles present in the nucleus of an atom are - (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Last Answer : (2) Proton, neutron Explanation: The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911, as a result of Ernest Rutherford's ... mass of an atom is located in the nucleus, with a very small contribution from the orbiting electrons.

Nucleus of an atom consists of. (1) Proton (2) Neutron (3) Proton and Neutron (4) Electron, Proton and Neutron

Description : Nucleus of an atom consists of. (1) Proton (2) Neutron (3) Proton and Neutron (4) Electron, Proton and Neutron

Last Answer : (3) Proton and Neutron Explanation: The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911, as a result of Ernest Rutherford' ... of an atom is located in the nucleus, with a very small contribution from the orbiting electrons.

Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom more available for protonation. (c) the presence of CH3 group sterically hinders the protonation of the NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Description : Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) ... NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Last Answer : the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation

Which of the following is not correct concerning substitution and elimination reactions of alkyl halides? (a) The electrophile replaces the leaving group. (b) Compounds containing electron-donating groups bonded to an sp3 hybridized carbon undergo substitution and elimination reactions. (c) The electronegative atom is replaced by another atom or group in substitution reactions. (d) (a) and (b)

Description : Which of the following is not correct concerning substitution and elimination reactions of alkyl halides? (a) The electrophile replaces the leaving group. (b) Compounds containing electron-donating groups bonded to an ... replaced by another atom or group in substitution reactions. (d) (a) and (b)

Last Answer : (a) and (b)

Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing HCl and a methyl radical. (c) forming a carbanion intermediate that rapidly dissociates to produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane

Description : Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing ... produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane

Last Answer : abstracting a hydrogen atom from methane, and producing HCl and a methyl radical

Which of the following statements is incorrect? (a) Electrons move toward positively charged locations. (b) An electron-rich atom is called an electrophile. (c) An electrophile is electron loving. (d) A nucleophile has a a pair of electrons it can share

Description : Which of the following statements is incorrect? (a) Electrons move toward positively charged locations. (b) An electron-rich atom is called an electrophile. (c) An electrophile is electron loving. (d) A nucleophile has a a pair of electrons it can share

Last Answer : An electron-rich atom is called an electrophile.

How many electron lone pairs are on the central atom in Hydrogen Sulfide?

Description : How many electron lone pairs are on the central atom in Hydrogen Sulfide?

Last Answer : ANSWER: TWO

Which of the following terms refers to the energy released when an electron is added to a neutral atom? w) electrovalence x) electron affinity y) electroconductance z) none of these

Description : Which of the following terms refers to the energy released when an electron is added to a neutral atom? w) electrovalence x) electron affinity y) electroconductance z) none of these

Last Answer : ANSWER: X -- ELECTRON AFFINITY

The total energy of revolving electron in an atom (1) cannot be negative (2) can have any value above zero (3) can never be positive (4) will always be positive

Description : The total energy of revolving electron in an atom (1) cannot be negative (2) can have any value above zero (3) can never be positive (4) will always be positive

Last Answer : can never be positive

The fundamental particles present in the nucleus of an atom are (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Description : The fundamental particles present in the nucleus of an atom are (1) Electron, proton (2) Proton, neutron (3) Neutron, electron (4) Neutron, positron

Last Answer : Proton, neutron

Nucleus of an atom consists of. (1) Proton (2) Neutron (3) Proton and Neutron (4) Electron, Proton and Neutron

Description : Nucleus of an atom consists of. (1) Proton (2) Neutron (3) Proton and Neutron (4) Electron, Proton and Neutron

Last Answer :  Proton and Neutron

the factor that affects how easily an electron can be removed from an atom is the -General Knowledge

Description : the factor that affects how easily an electron can be removed from an atom is the -General Knowledge

Last Answer : D. structure of the atom.

Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number. -Science

Description : Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number. -Science

Last Answer : Atomic number of sodium (Z) =11 Mass number of sodium (A) = 23 Number of protons in the nucleus = 11 Number of neutrons in the nucleus =23-11 = 12 Number of electrons = 11 Electronic ... the electronic configuration is 2, 8(K, L). However, the number of protons and neutrons remains the same.

By which can the location and energy of an electron in an atom be specified? -Do You Know?

Description : By which can the location and energy of an electron in an atom be specified? -Do You Know?

Last Answer : answer:

What do you think happened to the size of an atom when the atom loses an electron?

Description : What do you think happened to the size of an atom when the atom loses an electron?

Last Answer : The atom would stay the same size because it would still have the same amount of energy levels. The mass of the atom would be slightly less though.No, an atom shrinks when loosing an electron.There ... by the same number of protons ('+'charges) in nucleus, so the atraction per electron is stronger.

Which atom has only one electron?

Description : Which atom has only one electron?

Last Answer : Answer: hydrogen.

Who discovered the electron inside the atom ?

Description : Who discovered the electron inside the atom ?

Last Answer : Thomson discovered the electron inside the atom.

When was the electron discovered inside the atom ?

Description : When was the electron discovered inside the atom ?

Last Answer : He discovered the electron inside the atom in 1896.

How many times lighter is an electron than an atom of hydrogen ?

Description : How many times lighter is an electron than an atom of hydrogen ?

Last Answer : An electron is 1638 times lighter than a hydrogen atom.