under what circumstances can energy level transitions occur?

Under What Circumstances Can Energy Level Transitions Occur??

Energy level transitions can occur only when an electron gains or loses the exact amount of energy that separates two energy levels.

What radiation types are caused by electron energy level transitions in atoms?

Transitions produced in electron shell energy levels result in the emission of energy as x-radiation. This radiation consists of photons of electromagnetic radiation similar to gamma radiation.

What do we mean when we say that energy levels are quantized?

Energy is quantized in some systems, meaning that the system can have only certain energies and not a continuum of energies, unlike the classical case. This would be like having only certain speeds at which a car can travel because its kinetic energy can have only certain values.

How does an electron move to a higher energy level quizlet?

To move to a higher level, an electron must gain a quantum of energy (heat) from the outside. How can electrons move to a lower energy level? To move to a lower energy level, an electron will release a quantum of energy (released as light) to the outside.

Under what conditions are two atoms different isotopes of the same element under what conditions are two atoms different isotopes of the same element?

Physical Properties of Water

What are energy level transitions?

Transition of an Electron and Spectral Lines. In chemistry, energy is a measure of how stable a substance is. The lower the energy level of an electron, the more stable the electron is. Thus an electron would be in its most stable state when it is in the K shell ( n = 1 ) .

When an electron makes a transition from one energy level to another?

1n. Hint: When an electron is revolving in an orbit it will be having some energy. Every orbit has different energy levels and when an electron transits from higher energy level orbit to lower energy level orbit energy difference between the two levels is liberated as photons.

Is energy discrete or continuous?

Energy in general is continuous, in the sense that any value of the energy can be measured. However, for systems such as the electrons in atoms which are stable, only certain energies are permitted. The permitted energies are discrete, not continuous.

Is energy continuous or quantized?

In other words, energy was not continuous, it was quantized – only certain energies are allowed. Continuous energy and quantized energy can be likened to a ramp versus a set of stairs connecting two levels of a building.

When an atom emits photons its energy level increases?

It has one electron attached to the nucleus. The energy in a hydrogen atom depends on the energy of the electron. When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level.

What must happen for an electron to transition to a higher energy level?

The electrons must have to gain energy to move to a higher level, if the electrons loses energy then it will move down in energy levels. … There are four orbitals, in each energy level, electrons are in the orbitals that have the lowest energy.

What must happen to an electron for it to move to a higher energy level?

An electron will jump to a higher energy level when excited by an external energy gain such as a large heat increase or the presence of an electrical field, or collision with another electron.

What must happen for an electron to fall to a lower energy level?

When ever electron gets energy , it gets excited to higher energy level and when it comes to lower energy level , it releases energy, so for electron to come to the lower energy level it should release energy.

What must occur for two atoms to be isotopes of each other?

To be isotopes, the atoms must have the same atomic number. … Isotopes: atoms of the same element can have different numbers of neutrons.

What are the two requirements for two atoms to be isotopes of each other?

If two atoms have different numbers of protons, they are different elements. However, if two atoms have the same number of protons, but different numbers of neutrons we refer to them as isotopes. Two terms we use to identify nuclides (isotopes) are atomic number and mass number.

In what ways are the isotopes similar and in what ways do they differ?

An isotope is a different form of the same element. They differ from each other by the number of neutrons, however they have the same number of protons and electrons. This results in a different atomic mass.

Which electron transition emits the most energy?

Which releases the greatest energy? n = 3 to n = 1 releases the most energy (all transitions involve n changing by 2, but the lower transitions are larger).

How do electronic transitions occur?

Molecular electronic transitions take place when electrons in a molecule are excited from one energy level to a higher energy level. The energy change associated with this transition provides information on the structure of a molecule and determines many molecular properties such as colour.

How do you find the energy of a transition?

The energy change associated with a transition is related to the frequency of the electromagnetic wave by Planck’s equation, E = h?. In turn, the frequency of the wave is related to its wavelength and the speed of light by the equation c = ??.

When an electron in a hydrogen atom makes the transition?

The electron in a hydrogen atom makes a transition n1→n2, where n1 and n2 are the principal quantum numbers of the two energy states. Assume Bohr’s model to be valid. The time period of the electron in the initial state is eight times that in the final state.

Are electrons closer to the nucleus more stable?

Electrons are farther away for higher values of n. … Electrons that are closer to the nucleus are thus more stable, and less likely to be lost by the atom. In other words, as n increases, so does the energy of the electron and the likelihood of that electron being lost by the atom.

What is the energy of possible excited state of hydrogen?

Excited state is defined as the energy state which is higher than the ground state. For the first excited state, ${\text{n = 2}}$. Hence the value of energy for the first excited energy of hydrogen atom is $ – 3.40{\text{eV}}$. Hence the correct option is B.

Why energy is not continuous?

A most important difference between the new and the old physics is the recognition that energy is not continuous. photons whereas blue or ultraviolet radiation is comprised of photons of higher energy. … If the radiation is of too low a frequency, each photon has insufficient energy to dislodge electrons from the metal.

What is continuous energy?

“Continuous Energy spectra” in nuclear chemistry typically refers to the fact that kinetic energy of electrons (or positrons) released in beta decays can take any value from a specific range of energies.

Why are energy levels discrete?

The discrete energy levels arise because electrons are bound to the atom, and thus have a wave function that must asymptotically go to zero at large distances from the nucleus.

Are electron energy levels continuous?

Translational energy levels are practically continuous and can be calculated as kinetic energy using classical mechanics. … At even higher temperatures, electrons can be thermally excited to higher energy orbitals in atoms or molecules.

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Is the energy of matter continuous?

According to the older theories of classical physics, energy is treated solely as a continuous phenomenon, while matter is assumed to occupy a very specific region of space and to move in a continuous manner. …

Which of the following energy level changes for an electron is least energetic?

33 Cards in this Set

what is the subatomic particle having a negligible mass and a negative charge?	electron
which of the following energy-level changes for an electron is least energetic? a.2-1 b.5-4 c.3-2 d.4-3 e. all changes have the same energy	b. 5-4
what is the term for a particle of radiant energy?	photon

Under what circumstances can an atom emit a photon?

Under what circumstances can an atom emit a photon? A photon is emitted when an atom moves from an excited state to its ground state or to a lower-energy excited state.

Which transition causes the photoelectric effect?

Hence the n=3 to n=2 transition must have caused the photoelectric effect.

How do electrons change energy levels?

According to Bohr, the amount of energy needed to move an electron from one zone to another is a fixed, finite amount. … The electron with its extra packet of energy becomes excited, and promptly moves out of its lower energy level and takes up a position in a higher energy level.

What must occur for an electron to move to a more distal orbital?

In order for an electron to move to a more distal orbital farther from the nucleus, which of the following must occur? Energy must be added. formed when two atoms share one or more pairs of valence electrons. … They can occur in any case when hydrogen is bound to a more electronegative atom.

What conditions must occur for two atoms to be isotopes How is average atomic mass determined?

The number of neutrons is variable, resulting in isotopes, which are different forms of the same atom that vary only in the number of neutrons they possess. Together, the number of protons and the number of neutrons determine an element’s mass number.

What subatomic particles can vary between isotopes of the same element?

The number of neutrons can be different, even in atoms of the same element. Atoms of the same element that contain the same number of protons, but different numbers of neutrons, are known as isotopes.