Unit 2 Packet 2 - Electrons & Energy

Quantum

the minimum amount of energy that can be gained or lost by an atom

Electromagnetic spectrum

The range of electromagnetic waves placed in order of increasing energy (Light is on the electromagnetic spectrum)

Photon

a quantum of light energy

Radiation

Energy that is radiated or transmitted in the form of rays or waves or particles.

Wavelength

Horizontal distance between the peaks of two adjacent waves.

Frequency

How many wave peaks pass a certain point per given time.

Units for frequency

1/s or Hz

The longer the wavelength, the ____________ the energy.

Lower the energy.

The longer the wavelength, the _______________ the frequency.

Lower the frequency

The higher the frequency, the __________________ the energy

Higher energy

The higher the frequency, the __________________ the wavelength

Shorter wavelength

relationship between wavelength and frequency

As wavelength increases, frequency decreases

Relationship between wavelength and energy

as wavelength increases, energy decreases

Relationship between frequency and energy

as frequency increases, energy increases

Niels Bohr discovered what three things?

1. Electrons orbit at a fixed distance from nucleus (energy level)

Lowest energy level that an electron can occupy

ground state

Energy level that an electron occupies when it apsorbs energy

excited state

Number of electrons

same as the number of protons

The color of the emitted light is dependent on the ____________ of the light.

Wavelength

Light emitted by and element is dependent on

The movement of their electrons

A flame test can be used to

identify the presence of certain elements in a compound

Electromagnetic waves from low to high energy

radio, microwaves, infrared, visible (ROYGBIV), ultra-violet, x-ray, gamma

Atomic Number

the number of protons in the nucleus of an atom