Why caesium is used in photoelectric cells?

Q: What is the frequency of light having a wavelength of 647 nm.

A:

Q: The violet line in the atomic spectrum of lead has a wavelength of 406 nm. Calculate the energy of a…

A: The Energy of photon can be calculated by using the given relationship:   E=hcλ where the h is plank…

Q: Explain why ionized calcium can form absorption lines, but ionized hydrogen cannot.

A: Absorption lines occur when an atom absorbs a photon with an energy equal to the difference between…

Q: Explain how an emission spectrum is produced.

A: The lowest energy state of an atom is known as its ground state while the higher energy states are…

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: - What is the frequency of this light?

A: Given :- wavelenghy of light = 690 nm  To calculate :- frequency of light    frequency = speed of…

Q: What determines the color of light? Describe the difference between red light and blue light.

A: Given color of lights,      Red light and blue light.

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: State the exclusion principle. What does it imply about the number and spin of electrons in an…

A:

Q: What color would the element Lithium be in a flame test? Explain why using the emission spectrum

A:

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: Explain why different elements produce different spectral absorption and emission lines.

A: The spectral absorption and emission lines. The absorption spectra is produced when the atom absorbs…

Q: describe an atomic emission process ( as it gives rise to a portion of an emission spectrum)

A: The chemical compound emits electromagnetic radiations when transition occurs from high energy state…

Q: Describe the three things that could happen to enablea photoexcited electron to become more stable

A: In a chemical reaction; the substance which involves in conversion is said to be reactant whereas…

Q: Which of the following is not a property or parameter of electromagnetic radiation? O Wavelength O…

A: Here option 'c' is correct option. I.e. Voltage will be correct option. It means Voltage is not a…

Q: 7. All the following is an example of photon detectors EXCEPT: Vacuum phototube O Silicon…

A: Photon detector devices are mainly Vaccum phototube, Silicon photodiodes and Photomultiplier tubes.…

Q: d. If light with a wavelength of 690 nm strikes the photocathode, what is the maximum kinetic energy…

A:

Q: What can be concluded from the diffraction pattern generated by a single electron fired in the…

A: “Since you have asked multiple MC questions, we will solve the first question for you. If you want…

Q: Distinguish between two different types of shielding?

A: The electrons which are present in the last shell of an atom are named as valence electrons and…

Q: Determine the shortest frequency of light required to remove an electron from a sample of Ti, if the…

A:

Q: The strongest emission line for helium is at 420nm. What is the formula for determining the energy…

A:

Q: of energy to trigger a series of impul= is wavelength, 2.9 um, are needed?

A: Energy = N • h • c / ( wavelength )  Where : N = number of photons  h = 6.626 • 10^-34 Js  c = 3.0 •…

Q: What is the color of a visible radiation having an energy of 3.60 x 10-19 Blue : 440 - 490 nm קנ…

A: Given :- energy of radiation = 3.60 × 10-19 J  To identify :- color of radiation

Q: The Find the minimum energy needed to eject electrons from a metal with a threshold frequency of…

A: The minimum energy needed to eject electrons from a metal is, Eb = hv0 where, E = minimum energy, h…

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

A: This question is related to elementary particles.

Q: The binding energy of electrons to chromium metal is 7.21x 10-19 J. What is the longest wavelength…

A: Electromagnetic spectrum involves different radiations from the lowest to the highest frequency…

Q: Part 1: Thin layers of potassium (Φ= 3.68 * 10^-19 J) and sodium (Φ= 4.41 * 10^-19 J) are exposed to…

A: Given: Φ i.e. work function of potassium, K = 3.68 × 10-19 J Φ of sodium, Na = 4.41 × 10-19 J. And…

Q: Which of the following statements is true about the visible electromagnatic radiation? O it is only…

A:

Q: Rank these photons in terms of increasing frequency: blue radiation with A = 450 nm; red light with…

A: The relationship between the frequency and wavelength of radiation is given by  f = c/λ where λ =…

Q: Calculate the frequency of the red light emitted by a neon sign with a wavelength of 659.9 nm.

A:

Q: Describe what is the photoelectric effect?

A: We know that light radiations move in the forms of photons(discrete packets of light) and when these…

Q: Calculate the wavelength, in nm, of a Rhobonium atom traveling with a velocity of 0.07000 kilometers…

A: The problem is based on de Broglie wavelength i.e, wavelength = h/mv where, h is the Planck constant

Q: What is the longest wavelength a light that will eject electrons from a chromium metal

A: This is a problem from photoelectric effect. The solution here can be off two types if kinetic…

Q: When writing the ground state for 28NI, how many unpaired electrons are there?

A: NOTE: Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: Determine the shortest frequency of light required to remove an electron from a sample of Ti metal,…

A: The binding energy of titanium is 3.14 × 103 kJ/mol We know that , 1 mol contain = 6.022 × 10²³…

Q: A wavelength of 250 nm is equal to?

A: Note - We are assuming that you are probably asking to convert the unit from nm to m. If that's not…

Q: a metal plate has a binding energy of 350.0kJ/mol. if a photon with a wavelength of 275 nm strikes…

A: Given,The binding energy = 350.0 kJ/molWavelength = 275 nm

Q: An electron ejected from a metal has a deBroglie wavelength of 3.0 nm. If the metal was irradiated…

A: de-Broglie wavelength = 3.0 nm metal was irradiated with 341.0 nm wavelength light.

Q: 1.Why is it significant that the color emitted from the hydrogen emission spectrum is not white?

A: The emission spectrum of an element corresponds to the spectrum of frequencies  that an atom's…

Q: A particular laser consumes 150.0 Watts of electrical power and produces a stream of 3.98×1019 1087…

A: Using the formulae:

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.