A certain oxygen atom has the electron configuration 1s22s22px22py2. How many unpaired electrons are present? Is this an excited state of oxygen? In going from this state to the ground state, would energy be released or absorbed?

Q: Explain Hund's rule and the Pauli exclusion principle. Justify your answer by providing an example…

A: Hund’s rule states that in the orbitals of the subshell, the electrons fill one by one till the…

Q: Three of the known wavelengths of the emission spectrum of helium are 402.6 nm, 447.1 nm and 587.5…

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

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI…

A: Answer: As per the energy diagram, in the given atom, electron has 3 energy levels named as A, B and…

Q: 8. How much energy (in kilojoules) is released by a hydrogen atom when an electron falls from the…

A: The energy of nth orbital of a hydrogen atom is calculated by the formula, The wavelength of…

Q: In Einstein's photoelectric experiment, the kinetic energy (K.E.) of an electron displaced from a…

A: The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light,…

Q: When a metal was exposed to photons at a frequency of 1.11 × 1015 s-1, electrons were emitted with a…

A: Given frequency = 1.11×10¹⁵ s-¹  Kinetic energy = 3×10-¹⁹ J  We have to find work function

Q: A certain microwave oven delivers 750 watts (J/s) of power to a coffee cup containing 35.1 g of…

A: Time taken and energy of photon is calculated for given

Q: When a metal was exposed to photons at a frequency of 1.19 × 10'5 s-', electrons were emitted with a…

A: You can find the work function of the metal which is the energy required to free the electron from…

Q: Consider the four scenarios involving visible light. In scenario A, visible light has a wavelength…

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Q: When a metal was exposed to photons at a frequency of 1.10 x 1015 s-, electrons were emitted with a…

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Q: DNA is one of the most important biological molecules. It is the chemical that makes up the genetic…

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Q: In a hydrogen atom, an electron loses energy from n = 5 to n = 2, a process that leads to some kind…

A: The formula used to calculate energy of line spectrum of hydrogen atom. RH is the Rydberg constant.…

Q: A local AM radio station broadcasts at a frequency of 592 KHz. Calculate the energy of the…

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Q: References The cation He'(g) has an excited electron that drops from it's excited energy to the…

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Q: "When you heat up an element, the photons gain energy. They move from a ground state (far from the…

A: Given statement: "When you heat up an element, the photons gain energy. They move from a ground…

Q: Some chemical reactions, such as formation of ozone in Earth's stratosphere, can be initiated by…

A: The relationship between wavelength and energy is given by  E = hc / λ where E = energy of photon in…

Q: 9. Spectral lines are shown in the image below. But what are they? Explain how spectral lines are…

A: Each element  have different  spectra due to different number of electrons  in valence  shell.

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

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Q: Note: There are two parts to this question. The electron in an excited H-atom undergoes a transition…

A: Given that, final energy state, nf = 2 E = 4.576×10-19 J To find: Initial energy level? region of…

Q: Only specific amount of energy can be absorbed and emitted by an atom. Energy Photon E5 (n=5) E4…

A: Electron spectroscopy refers to a group which is based on the analysis of the energies of emitted…

Q: An electromagnetic radiation is fired at a hydrogen atom causing electron excitation from n = 1 to n…

A: When an electron gain energy it is excited to higher energy level. On reaching the higher level it…

Q: ے EI, الامممممما Mg Si

A: Answer: Energy required to remove an electron from an isolated gaseous atom or ion is called as its…

Q: Determine the magnitude (in J) of the splitting of the different levels of the 3d' configuration.…

A: ANSWER : Magnitude of splitting = hcA~   =  2.19 x 10-7 . hcRWhere h = plank's constant =  6.62 x…

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

A: Let us firstly draw electromagnetic spectrum and than find out the order of given radiations.

Q: Example #1: a) Ag total electrons b) Cl total electrons с) Са total electrons

A: Total number of electrons = Number of Protons = Atomic number of the element a) Ag = 47 electrons b)…

Q: 7 excited state. The atom then emits a photon, The Li2+ion is originally in the n = transitioning to…

A: Given  :  Initial state of Li+2 (n) = 7  Energy of emitted photon = 11.1057 eV

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI…

A: Answer:Here, h is called as Planck's constant and c is the speed of light.

Q: 5. The minimum energy needed to break an oxygen-oxygen bond in ozone is 387 kJ/mol. Does a photon…

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Q: The work function (binding energy) is the energy that must be supplied to cause the release of an…

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Q: A B 2 3 n=4 Hydrogen Atom Use the Bohr model of the hydrogen atom to determine the properties of the…

A: Bohr model represents the electrons around the nucleus. Electrons move in circular orbits. When…

Q: Consider the diagram, shown below, representing a six carbon atom cyclic benzene molecule with six…

A: When a particle is confined inside a ring it can be considered analogous to a particle in a…

Q: * Question Completion Status: QUESTION 4 Roaches for sale | C... For Sale/Trade/Wan... * Tarantulas…

A: This question is related to the atomic structure of hydrogen atom. Hydrogen is the first element in…

Q: Suppose an oven's radiation wavelength is 0.125 m. A container with 175.00 g of water was placed in…

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Q: ledu.co Question 16 of 16 In Einstein's photoelectric experiment, the kinetic energy (K.E.) of an…

A: The kinetic energy of an electron is the difference between the energy of incident photon and the…

Q: 4. Electrons must gain energy in order to move from lower energy levels to higher energy levels.…

A: As per Bohr model of atom, electrons are known to found in energy levels surrounding the nucleus.…

Q: Suppose that the microwave radiation has a wavelength of 12.4 cm . How many photons are required to…

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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.