An atom can be excited   a. if it emits a photon.   b. if it collides with another atom or electron.   c. if it absorbs a photon.   d. if a and b occur.   e. if b and c occur.

Q: Describe the Rules used to place electrons into a configuration:

A: There are following Rules used to place electrons into a configuration:    (1) Aufbau's rule or…

Q: How are the wavelength and frequency of light related?

A: Shorter the wavelength, higher will be the frequency and longer the wavelength, lower will be the…

Q: Discuss Einstein’s theory of Photoelectric effect. What conclusion can be drawn from Einstein’s…

A:

Q: nan atom in its lowest type your answer. state type your answer. a photon, an electron jumps to a…

A: Ash

Q: What is the relationship between energy and frequency of light?

A: Given terms,      Energy and frequency of light

Q: Atomic emission spectra are caused by: O Electrons moving from lower energy levels to higher energy…

A: Answer of this question :-  Atomic emission spectra :- A series of bright lines, separated from each…

Q: What happens in the process of fluorescence? a. water molecules are broken up into hydrogen and…

A: Fluorescence is the phenomenon in which emmision of light takes place by absorbed light or…

Q: Which atom is smaller?

A: Given ; H and He

Q: When an intense beam of green light is directed onto a copper surface, no electrons are ejected.…

A: The frequency that is required by the radiation to eject energy from the metal surface is called as…

Q: Hydrogens emission spectrum includes a set of infrared lines called the Pfund Series that are caused…

A: Wavelength is the difference between two successive crests or troughs. Equation E=hv used to…

Q: Consider the three electromagnetic waves shown in the image. Which wave has the longest wavelength?…

A: (a) In ths wave data: The wavelength is explained as the distance covered by two consecutive crests…

Q: Which matters in the formation of photoelectrons: intensity or wavelength?

A: Upon absorption of certain frequency of light (electromagnetic radiation) by the metal surface,…

Q: Draw orbital diagram.. please send me the question in 20 minutes it's very urgent plz find

A: Given : structure of molecule.  Molecule have two sigma c-h bond, one sigma-c-o bond and one-π c-o…

Q: Electrons can jump to higher energy levels when they(absorb/emit) a______photon.

A: An atom is made up of three particles namely, electrons, protons, and neutrons. Together protons and…

Q: Consider a orbital. a. What are the allowed values for the and quantum numbers for a orbital? b.…

A: Quantum numbers are the set of four numbers with the help of which we can get complete information…

Q: How do the emission spectra for hydrogen and helium compare? helium has more emission lines in the…

A: Emission spectra is obtained when an atom is introduced to energy it gets excited to a higher energy…

Q: During light emission of red light, when is a photon emitted? Is this a high or low energy…

A:

Q: What is an atomic orbital? How does an atomic orbital differ from an orbit?

A: Atomic orbital:- it is a mathematical function describing the location and wave like behaviour of an…

Q: A photon has a wavelength of 359 nm. Calculate the energy of the photon in joules. Enter your answer…

A: The relation to determine the energy of a photon for electromagnetic radiation is given by,…

Q: a. How many orbitals are in this subshell? [ Select ] b. What is the shape of one of the orbitals in…

A:

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

A:

Q: Match the evidence and reasoning to support the claim: Light is a particle. Evidence: I. Light…

A:

Q: What are three deficiencies of the wave model of light related to light’s interaction with matter?

A: According to a Wave model for light, the light is made up of wave that vibrates up and down to the…

Q: The study of light emitted by the hydrogen atom by Niels Bohr and others revealed that A) energy is…

A: Niels Bohr described the structure of the hydrogen atoms as a densely packed nucleus of protons and…

Q: A photon has a wavelength of 745 nm. Calculate the energy of the photon in joules. Enter your answer…

A: The relation to determining the energy of a photon for electromagnetic radiation is given by,…

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule: B…

A: Given Energy diagram

Q: The quantum number defines the shape of an orbital. Use the editor to format your answer

A: In this question, we will discuss on the quantum number which defined the shape of an orbital.  You…

Q: Describe Niels Bohr's model of the structure of the hydrogen atom. More than one selection may be…

A: Option  A, C and D is correct answer.

Q: Which type of radio waves are used to broadcast FM station?

A: Radio waves are coming under the category of  electromagnetic radiation. They are best to use…

Q: Moving to another question will save this response. on 14 ich of the following correctly describe…

A: a) When e-  are in any energy orbit or level, they should also have same energy as that of that…

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule: B…

A: Energy is inversely proportional to the wavelength. E=hv ( Niels Bhor ) h=Planck constant…

Q: When a gas such as Neon is heated and emits light that is then placed in a prism and an emission…

A: The emission spectrum of a chemical element or chemical compound is a spectrum of electromagnetic…

Q: Find the longest wavelength of a wave tha

A:

Q: The pictures that are drawn to depict atomic orbitals represent

A: The picture that are drawn to represent atomic orbital show the region of about 90% probability of…

Q: 1. About the atomic models; (a) Cite two important quantum-mechanical concepts associated with the…

A: (a) Two important quantum-mechanical concepts associated with the Bohr model of the atom are: 1.…

Q: What happens when an electron in a hydrogen atom moves from a lower energy orbital to a higher…

A: The solution is as follows :

Q: In addition to absorption of a photon, energy can be transferred to an atom by collision. Consider a…

A: Given :  Consider a hydrogen atom in its ground state. Incident on the atom are electrons having a…

Q: This energy diagram shows the allowed energy levels of an electron in a certain atom or molecule: -B…

A: Given

Q: Why has the photon’s energy changed?

A: Photons can be defined as an elementary particles which contains no resting mass, no charge and…

Q: How many valence electrons and how  many core electrons?

A: Valence electrons :- The electrons present in the outermost or valence shell (nth shell)  of an atom…

Q: Use the visible spectra above to complete the table for mercury. Report your answer using the…

A: The visible spectra are given, and it is required to calculate the following for mercury,Longest…

Q: d. Electromagnetic radiation and sound waves travel at e. The frequency of radiation increases as…

A:

Q: Which light wave has more energy?     microwaves     photons     FM radio     green light

A: Answer  The energy of the average visible photo is average of visible…

Q: a) Which diagram shows electron transitions that involve the most energy? b) Explain why this…

A:

Q: Explain why the emission spectrum is sometimes referred to as an element’s fingerprint.  Determine…

A: •EMISSION SPECTRUM:-When electron comes from higher energy level to lower energy level it releases…

Q: ground-state electron configuration

A:

Q: Sort sketches of the general shapes into the s, p and d orbitals. Drag the appropriate items to…

A:

Q: 4. When can you say that an electron is on its excited state? A. If electrons remains its energy…

A: 4) C 5) B 6) D

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.

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.