Chapter 4- Electrons In Atoms Flashcards
Why were scientist interested in the electrons
The give the element its chemical properties.
Why did scientist consider rutherfords nuclear model of the atom incomplete
The electron should be drawn into the nucleus
What do electrons not identity
Do not identify the atom, protons do
What kind of waves have the longest wavelength? Shortest?
Longest: long radio waves
Shortest: gamma waves
What waves have the lowest frequency
Radio waves
Which has a high frequency microwaves or X-rays
XRay
Which waves can be seen by the eye
Visible
How are the terms frequency and wavelength related
Inversely, as one increases the other decreases
What is quantum energy
It is the smallest quality of radiate energy
What phenomena can only be explained by the particle model
Photoelectric magnet
Difference between the continuous spectrum of white light and the atomic emission spectrum of an element
White light: shows all of the colors
Emission spectrum: only shows discrete bonds of light
How does an electron get from one energy level to another
It absorbs energy and jumps to a higher energy level
What happens when the electron falls from a higher energy level to a lower energy level
loses and gives off energy
Why do lines in the hydrogen emission spectra have a specific wavelength
The electron exist in specific energy levels
What does the word quantized mean
It is only distributed in specific amounts
Why should a continuous spectrum be produced when the light from a hydrogen tube is shined through a prism
The electron should be loosing energy and as it does the wavelength varies
Ground state
Electron is at its lowest energy level
Excited state
Electron absorbs energy and is in a higher energy level
Where did Bohr say the electron can be found
Around the nucleus
What did Bohr say about the energy of the electron when it is an orbit
It is constant
Where does the electron or atom have the lowest energy
Close to the nucleus
What is between the nucleus and the lowest energy level
Empty space
What is the energy of the photon
If the electron absorbs energy from a photon it can jump to a higher level
What is wrong with bohrs model
It only explains the line spectrum for hydrogen
According the Bohr why did the line emission spectra contain only certain frequencies of light
The electron only exists in the energy levels not in between photons
How did Louis deBroglie describe the electron
The electron are considered as waves confined to the space around an atomic nucleus
What happens to an electron when a photon is used to try to find it
The photon knocks the electron off course
What is the Heisenberg Uncertainty Principle
It isn’t possible to know the exact location and velocity of an electron at the same time
What does the schrodinger equation describe
Describes the probability of finding and electron with a math equation
How is an orbital difference from bohrs orbit
The orbital holds 2 electrons
What do quantum numbers describe
They tell us locations of electrons
Do atomic orbitals have a exactly defined size
No bc electrons are in constant motion
How many electrons does an orbital hold
2
