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

Q: The wavelength of an electron exist in a * stable orbit n=1 is equal to 3.33 A° O 2.22 A° O 4.44 A°…

A: NOTE : Since there is no information about the atom, we can assume it to be hydrogen. Given : State…

Q: Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a…

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Q: What is single-crystal X-ray analysis ?

A: Using technique of single-crystal X-ray analysis .

Q: Define shielding and effective nuclear charge. What is the connection between the two?

A: Shielding =  The electrons that are present in the inner orbitals shields the outer most orbital…

Q: What is the peak frequency of the blackbody radiation emitted from a star whose temperature is 5400…

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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: State the Pauli exclusion principle. Explain how it is usedto determine the number of electrons that…

A: An electron has four quantum numbers: principal quantum number (n), Azimuthal quantum number (l),…

Q: Question 19 Which of the following is true about emission spectra? emission of energy from elements…

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Q: If rubidium has an emission line at 1.28 X 106 m and ng is 3, what is the initial energy level? 6.…

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Q: Define shielding and effective nuclear charge.What is the connection between the two?

A: The nuclear charge experienced by the valence or outer electrons is not equal to the actual nuclear…

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: write the electron configuration of scandium (Sc=, Z=21)

A: Electrons are filled in the manner  1s2s2p3s3p4s3d But written in the manner 1s2s2p3s3p3d4s

Q: The Pauli Exclusion Principle requires that

A: According to the Pauli Exclusion Principle, no two electrons can have same set of all four quantum…

Q: describes how an atom emits color

A: The atoms emit colors.

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: The wavelength of an electron exist in a * stable orbit n=1 is equal to 3.33 A° O 4.44 A° O 1.11 A°…

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Q: explain the concept of penetration and shielding. Make reference to energy.

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Q: Calculate the temperature at which the wavelength of a neutron is 1.36 Å. 4.0 K

A: The answer is given below

Q: If calcium has an emission line at 657 nm, the electron travels from what energy level to n = 2? n;…

A: wavelength = 657nm = 657 x 10-9 m  Final = n=2 Initial = ?

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

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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: What is the frequency of ultraviolet light with a wavelength of 303 nm? Hz

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Q: Atoms can be ionized by thermal collisions, such as at the high temperatures found in the solar…

A: Solar corona is the aura of plasma that surrounds the sun and other stars.  This region in sun…

Q: Calculate the wavelength of light produced when an electron is promoted from level 1 to level 2.

A: Electron goes from level 1 to level 2 We need to find wavelength of light.

Q: What is the energy of an X-ray with a wavelength of 5.49 nm?

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Q: With specific reference to the Calcium atom, describe what is meant by the term 'shielding effect'.

A: Shielding effect: Shielding effect is defined as the decrease in attraction between an electron and…

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: What is the shorthand electron configuration for a silicide ion?

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Q: ne Pauli exclusion principle?

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

A: This question is related to elementary particles.

Q: Calculate the frequency of the radiation emitted when an electron in a hydrogen atom drops from the…

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Q: Which of these spheres represents F, which represents Br,and which represents Br-?

A: We are given the elements F and Br they belong to the group-17 and they are known as the halogens.…

Q: Write an equation for the removal of an electron from a sodium atom

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

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Q: Which of the following is correctly following the Pauli Exclusion Principle , explain why. Is as ap…

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Q: Selenium is a photoconductor which means O it is an insulator in the dark and a conductor when…

A: Correct option - - > It is an insulator in the dark and a conductor when exposed to light.…

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: what is the binding energy of an electron in a photosensitive metal (in kJ/mol) if the longest…

A: The binding energy ϕ  is the energy that would have needed to be supplied by an incoming light…

Q: rbonate is used in fireworks to colour the flames red. (a) The red colour comes from lines of…

A: alkali and alkaline earth metals belong to the first and second groups of the periodic table…

Q: Write the Electron Configurations for Transition Metals?

A: d-block is region of the periodic table where the transition metals are found.

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.