Unit 4 chem

Units for frequency

Hz, 1/s, s^-1

Units for wavelength

m, nm

Units for momentum

kg, m/s,

What has to be met in order for electrons to be ejected

The frequency has to be above a certain threshold

Continuous specturm

Shows an unbroken range of all wavelengths or colors, without an gaps

Atomic emission spectrum

Consists of isolated lines of specific color on a dark background

Why does every element have a distinct atomic emission spectrum

Each element has a unique number of protons and electrons, creating a one of a kind arrangement of quantizted energy level

Photons can be thought of a stream behaving as both a ______ and a _______

Wave and particle

Largest frequency least to greatest

RMIVUXG

Radio, Microwave, Infrared, Visible, Ultra Violet, X-ray, Gamma rays

ROY G BIV

Red, orange, yellow, green blue, indigo, violet

List ROY G BIV in order of increasing wavelength

VIB G YOR

Wavelength

The distance between two matching points on a wave, trough to trough or crest to crest

Frequency

The number of complete waves that pass a specific point in one second

Photon

A tiny massless particle of light energy

Crest

The highest point of a wave

Energy

The ability to do work or cause change, which waves and particles carry

Electron

A negatively charged particle that orbits the nucleus of the atom

Heisenberg

You can’t know the exact position and momentum of an electron at the same time

De Broglie

Moving particles like electrons can travel and behave like a wave not just solid particles

Einstein

Light can act like tiny particles of energy called photons, which can knock electrons loose