A photoelectric experiment was performed by separately shining a laser at 450 nm (blue light) and a laser at 560 nm (yellow light) on a clean metal surface and measuring the number and kinetic energy of the ejected electrons. Which light would generate more electrons? Which light would eject electrons with greater kinetic energy? Assume that the same amount of energy is delivered to the metal surface by each laser and that the frequencies of the laser lights exceed the threshold frequency.

Q: It requires a minimum of 216.4 kJ/mol to remove an electron from a potassium metal surface. If UV…

A:

Q: Which of these produces a discrete (or line) spectrum of electromagnetic radiation? O light emitted…

A: Please find your solution below : A discrete or a line spectrum is spectra formed when items are…

Q: Calculate the wavelength (in nm) of a light that shines on the surface of a piece of metal with the…

A:

Q: What does the photoelectric effect tell us about the atom and the removal of electrons?

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Q: A student investigating the photoelectric effect attempts to measure the kinetic energy of electrons…

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Q: A minimum of 352.3 kJ/mol is required to remove an electron from a(n) uranium metal surface. What is…

A: Given data, Energy to remove an electron = 352.3 kJ/mol We know, 1 mole = 6.022 x 1023 electrons…

Q: ultraviolet light can be used to sanitize objects because most bacerial cells are destroyed when…

A: • The values provided in the question are:-     i) Wavelength of ultraviolet light, λ = 264 nm = 264…

Q: d absorbs light of wavelength close to 280nm. In what part of the electromagnetic spectrum does this…

A: Electromagnetic spectrum -  It is the entire distribution of electromagnetic radiations according to…

Q: Calculate the average kinetic energy of ejected electrons in units of kJ / mol when a light with a…

A: There is very small correction in the question that is work function is - 435 kJ/mole not the…

Q: When a metal is irradiated with light an electron is ejected with a speed of 1.01 x 106 m/s. If the…

A: Given data: Speed = 1.01 x 106 m/s Work function = 6.88 x 10-19 J

Q: Why caesium is used in photoelectric cells?

A: Caesium (Cs) is a rare element. It belongs to alkali group and is a soft and silvery-gold…

Q: Determine the suitable energy source to be used in the visible region of the electromagnetic…

A: Thermal radiators made of tungsten emit a continuous spectrum of light that ranges in wavelength…

Q: Determine the frequency and energy for light with a wavelength of 710.2 nm710.2 nm .…

A:

Q: A particular laser consumes 150.0 watts of electrical power and produces a stream of 1.33x10^19…

A: Given, 150watts = 150 J/s

Q: A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.57 nm. It then…

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Q: It requires a minimum of 216.4 kJ/mol to remove an electron from a potassium metal surface. If UV…

A: The objective of this question is to calculate the maximum speed of an electron.

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: Electrons are ejected by the photoelectric effect when the surface of the metal rubidium is…

A: a) According to photoelectric effect, hν = K.E + hνo…

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

A:

Q: Heated lithium atoms emit photons of light with an energy of . What is the calculated frequency and…

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Q: Why do scientists study images made with parts of the electromagnetic spectrum other than visible…

A: We have various division of electromagnetic spectrum .

Q: 9. The work function of a collected metal is 8.0 x 10-10 J. Should a radiation of 150 nm hit the…

A:

Q: A bank robber forgot his tools, and only brought a red laser pointer, with a wavelength of 650. nm.…

A: We have to calculate the number of photons required.

Q: Determine the frequency of light ( X 1015 Hz) emitted when an electron in the hydrogen atom…

A: Given- ni = 2 nf= 1

Q: Which one of these types of electromagnetic radiation has the shortest wavelength? a)infrared b)…

A: Answer: option c) ultraviolet electromagnetic radiation has the shortest wavelength.

Q: A laser with an energy of 2.65 kJ has a photon wavelength of 1300. nm. How many photons does this…

A: We can solve this problem by using following equation E = h×c / λ E = energy h = planck's constant c…

Q: What was the significance of the electromagnetic spectrum in chemistry?

A: The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their…

Q: Which emission in the Lyman series of the hydrogen spectra has the longest wavelength? Calculate…

A: longest wavelength = 1215.67 A0 FALLS under ULTRA VOILET

Q: Explain why the emission of light energy of lower energy in fluorescence is not a viola- tion of the…

A: When the molecule absorbs photon of frequency, vex in the singlet ground state (So), it gets excited…

Q: Calculate the maximum wavelength, ?max, of electromagnetic radiation that could eject electrons from…

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Q: Calculate the difference in energy (in joules) between a photon with λ= 687 nm and a photon with λ=…

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Q: Data for the photoelectric effect of silver are given in the table. Frequency of incident radiation…

A: The multiplication of Planck's constant and frequency of incident radiation is equal to the sum of…

Q: Using these data, find the experimentally determined value of Planck's constant, ℎh , and the…

A: The value of plancks constant h = 6.63 x 10-34 J sAverage value of frequency = 3x1015 /sAverage…

Q: If a minimum of 454.4 kJ/mol is required to remove electrons from Ru atoms on a surface of a sample…

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Q: 12. What causes some parts of the electromagnetic spectrum to be harmful to humans? O short…

A: The correct answer is given below

Q: Who introduced the method of treating a photon gas ?

A: This question is related to elementary particles.

Q: The work function (ϕ) for the a metal is 7.00 x 10 -19 J. What is the longest wavelength of…

A: Given, work function (ϕ) for metal is 7.00 x 10 -19 J.

Q: The kinetic energy of an electron ejected from the surface of a metal is 4.68 x 10-19 J. Calculate…

A: We have to predict the wavelength of light needed.

Q: Suppose the Death Star's laser in Star Wars uses green light at a wavelength of 541.4 nm. A.…

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Q: calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of…

A: The frequency and wavelength of a radiation are related to each other as: ν=cλ

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.