Ch 9 Flashcards
(34 cards)
The number of waves produced per unit time
Frequency
What 2 things are inversely proportional
Wavelength and frequency
Tells how fast waves travel through space
Speed
Travels through space as electromagnetic radiation
Energy
Radiation that takes many forms, such as sunlight, microwaves, radio waves, etc.
Electromagnetic radiation
All electromagnetic waves travel at the speed of light and differ from each other in their frequency and wavelength
Vacuum
The classification of electromagnetic waves according to their frequency is called
Electromagnetic spectrum
Scientist also have much evident enough that light beams act as a stream of tiny particles called
Photons
The distance between any 2 successive crests of troughs
Wavelength
When atoms are energized, they often reemit the energy as _____
Give an example
Light
Neon lights
The absorption and emission of light is due to what
What happens as a result of this
Due to the interaction of light with the electrons in the atom
As a result, atoms of different elements exhibit a unique color and wavelength of light
A danish physicist, studied the hydrogen atom extremely, an developed a model for the atom that was able to explain the line spectrum
Neil’s Bohr
Atoms consist of electrons orbiting the nucleus at different distances from the nucleus, called
Energy levels
A model of the atom consisted of electrons orbiting the nucleus at different distance from the nucleus, called energy levels. In this model, the electron could only occupy particular energy levels, and could “jump” to higher level by absorbing energy
Bohr’s model
What is the lowest energy level
Ground state
What is the higher energy levels called
Excited state
When electrons absorb energy though heating or electricity, they move to (higher/lower) energy levels and the levels become excited
Higher
What happens when excited electrons return to the ground state
Energy is emitted as a photon of light is released
How is the color of light determined
Its determined by the difference in energy
What is produced by many of transitions between excited and ground states
Atomic spectrum
Who created a mathematical model that showed electrons as both particles and waves
Erwin Shrodinger
What did Erwin Shrodinger create
He created the quantum mechanical model
The quantum mechanical model predicted electrons to be located in a probability region called _____
Orbitals
What is defined as a region around the nucleus where there is a high probability of finding an electron
An orbital