Chapter 8 - Quantum-mechanical model of the atom

what is a wave

an oscillation that can transport energy from one point to another

what is light

a type of oscillating wave, also called electromagnetic radiation

what is electromagnetic radiation

perpendicularly oscillating electric and magnetic waves

what is the Electric field (E)

source of the electrostatic force, which in time can be created by regions of the space with given charges

what is the Magnetic field (B)

source of magnetic force created by a magnetic or as a consequence of the movement of electric charges (flow of electricity)

Amplitude

the height of the peaks of waves

Wavelength (lambda)

distance between two peaks or two valleys

What is the electromagnetic spectrum

a spectrum that shows where different wavelengths belong and how they are projected in nature

what is the dual nature of light

• light has wave properties: diffraction pattern and interference

• light has particle properties: photoelectric effect

what is the photoelectric effect

if you shine light on a metal plate, only a certain frequency or higher will remove electrons

what does the Bohr model of an atom say

• electron travel around the nucleus with a fixed radius

• electron is located at fixed distances from the nucleus

• the energy of each orbit must be a fixed value

what is ground state (gs)

the lowest energy level (n=1)

what is excited state

any state with a higher energy than the ground state

Absorption of light

electrons move to higher energy levels (ni = 3, nf = 6)

Emission of light

electrons move to lower energy levels (ni = 6, nf = 3)

Delta Energy

the change in energy of the electron