Excited Helium atoms radiate energy in what regions? please explain a)infrared region only b) ultraviolet region only c)infrared, visible, and ultraviolet regions d)visible region only e)visible and ultraviolet regions only

Q: 2. The wavelengths of the visible bands from a Helium lamp are given below. Calculate the…

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Q: List all possible values of the magnetic quantum number for a 3d electron.

A: Possible values that m (magnetic quantum number) can have, depend on the value of l (azimuthal…

Q: Using relevant quantum equations, show all your calculations (refer to the given table), compare the…

A: Given, Wavelength of Red light = 650  Frequency of Red light = 4.62 * 1014 Hz Wavelength of yellow =…

Q: Photons of wavelength 315 nm or less are needed to eject electrons from a surface of electrically…

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Q: An atomic emission spectrum of hydrogen shows three wavelengths: 121.5 nm, 102.6 nm, and 97.23 nm.…

A: The expression relating energy and wavelength of an atom is shown below.…

Q: A photon with a wavelength of 1094 nm is emitted when an electron “falls" from an initial energy…

A: Initial shell= 1

Q: In a ground state atom of Ar how many electrons total will have the quantum number { = 0?

A: quantum numbers tells the exact location of electron .its shell , subshell and orbital with its…

Q: The speed of light is _______?           equals frequency times wavelength     is the fastest…

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Q: at is the de Broglie wavelength of a 133-g baseball traveling

A: De-broglie wavelength (L) = h/mv Where, h= Planck's constant  m = mass v = Velocity  Now, L = 6.626…

Q: Energy of a photon is proportional to frequency, and proportional to wavelength. A) directly,…

A: The following relation defines the energy of a photon E=hν where ν-frequency of the photon. E-Energy…

Q: No two electrons in an atom can hav e four quantum numbers" is a statem e Pauli exclusion principle…

A: The electrons in an atom are filled in orbitals according to De-Broglie relation, Bohr's equation,…

Q: A few different types of electromagnetic radiation are listed in the table below. Complete the table…

A: In electromagnetic spectrum radiation are arranged in the order of decreasing wavelength and…

Q: Which quantum state (n,l,m{) is NOT possible?

A: Quantum number is the set of number that describes the state of an electron. There are four quantum…

Q: The minimum energy needed to eject electrons from chromium metal via the photoelectric effect is 434…

A: The relation between the energy and wavelength of radiation is as follows, Given: The minimum…

Q: what is the wave number for the shortest wavelength transition in the balmer series of hydrogen…

A: The formula to calculate wave number is,

Q: One of the following depicts the waves associated with infrared radiation, and one depicts the waves…

A: Since the distance between the two consecutive peaks gives the wavelength of the radiation  hence…

Q: Which of the following statements is/are incorrect? Select all that apply. You may choose more than…

A: Incorrect statement is

Q: An electron in a hydrogen atom transitioning from orbit n = 7 releases a photon whose frequency…

A: Given: Frequency = 6.44196×1013 s-1 Higher energy level =7

Q: Excited Lithium atoms radiate energy in what regions? a) infrared region only b) ultraviolet region…

A: Excited lithium atoms emit light strongly at a wavelength of 671 nm. Electromagnetic radiation…

Q: e table below you will find three descriptlons of sclentIsts engaging In activities that are p…

A: The missing word in the given discription given below.

Q: Which is true to oxygen waves? i. hydrogen peroxide and water are produced at -0.15 V and -0.85 V…

A: While carrying out polarographic measurements, the dissolved oxygen in the solution gets reduced and…

Q: Which of the following is not an allowed set of quantum numbers, i.e. does not follow the rules for…

A: There are four different quantum numbers.  They are, Principal quantum number (n): n= 1, 2, 3,......…

Q: An electron in 3s orbital has a greater penetration through inner shells than an electron in a 3p…

A: 1) Penetration describes the ability of an electron in a given subshell to penetrate within other…

Q: What is the relation between kinetic energy and frequency of the photoelectrons?

A: The photoelectric effect is a state in which electrons are expelled by the surface of metal on the…

Q: Two electromagnetic waves are represented in the margin. (a) Whichwave has the higher frequency? (b)…

A: Given: Two electromagnetic waves-visible light and infrared radiation (IR).

Q: Why do atoms become smaller as positive ions? Explain briefly.

A: Atoms are made up of electron, proton and neutron or more precisely it contains nucleus at its…

Q: Calculate the energy difference (AE) for the electron transition of n = 3 to n = 1 for 1.00 mol of…

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Q: Choose the correct arrangement of the following regions of electromagnetic spectrum in the order of…

A: Electromagnetic spectrum in Decreasing order of energy is, c) X-ray > Ultraviolet >Visible…

Q: what is an approximate frequency (in MHz) range of ultraviolet light?

A: frequencies of uv is about 8 × 108 to 3 × 1010  MHz.

Q: locity of an electrons having total energy of -13.6 eV in a hydrogen atom

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Q: The line of longest wavelength in visible light for the emission spectrum of hydrogen, 656nm (Balmer…

A: Applying concept of hydrogen spectrum. 1/lemda = RH (1/n21- 1/n22)

Q: The work function for lithium is 279.7 kJ/mol (that is, it takes 279.7 kJ of energy to remove one…

A: Given, work function of lithium = 279.7 kJ/mol According to Avogadro number of atoms, 1 mol of atom…

Q: following diagram is a shell representation of an atom. When the atom is exposed to light, the…

A: Representation of the structure of atom: Nucleus has positive charge. Nucleus contains protons and…

Q: Portions of electromagnetic waves A, B, and C are represented below (not drawn to scale). A в Which…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: 2. Calculate the theoretical energy value of each wavelength of light in the helium spectrum to…

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Q: The work function of a metal is 9.4 electron-volts (eV). What is the frequency of a photon which…

A: The work function of metal is 9.4 eV. The velocity of electron ejected from surface is 420 km/s.

Q: The Azimuthal quantum number, l, for an s-orbital is 0 and for a p-orbital is 1. The magnetic…

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Q: Solving the ultraviolet catastrophe (i.e., explaining why everyday objects do not radiate UV light),…

A: Given MCQ Statement:- Solving the ultraviolet catastrophe led directly to which of the following…

Q: A photon of electromagnetic radiation has an energy of 4.5x10 28J. What category of electromagnetic…

A: E=hCλ  where                h=Plank's constant                C=speed of light…

Q: Excited Beryllium atoms radiate energy in what regions? a) infrared region only b) ultraviolet…

A: CORRECT ANSWER IS OPTION ( C )

Q: hydrogen atom is initially four energy levels above the ground state (i.e., in the fourth excited…

A: If electron is in fourth excited state, then it is in 5th energy level.

Q: A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.05 nm. What is the…

A: The Rydberg’s formula can be written as follows,

Q: What are the allowed values for each of the four quantum numbers n, l, m, and ms Note please solve…

A: The allowed values for each of the four quantum numbers n, l, m, and ms has to be given,

Q: Titanium metal requires a photon with a minimum energy of6.94 * 10 - 19 J to emit electrons. (a)…

A: Photon is called the packet of quanta. It is basically an elementary particle. It is basic unit of…

Q: n atomic emission spectrum of hydrogen shows three wavelengths: 121.5 nm,102.6 nm, and 97.23 nm…

A: We are given some wavelengths, and we have to assign them to their suitable electron transition in…

Q: Electron orbits exist under what rules? O The orbit must represent a whole number multiple of a…

A: The electrons in lower orbits are stable (since they are attracted to nucleus). The electrons…

Q: A student describes the 3s electron in an atom as having a lower energy than the 2s electron in the…

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Q: a) Label each energy level (shell) by the principal quantum number b) Complete the following diagram…

A: Four questions based on atomic structure, which are to be accomplished.

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.