Electrons In Atoms And The Periodic Table

Front 1

Inert

Back 1

Lacking the ability or strength to move.

Front 2

Why is Helium Inert?

Back 2

Noble Gas

Front 3

Diatomic elements?

Back 3

Have No Fear Of Ice Cold Beer

Front 4

Mendeleev's periodic law?

Back 4

"when the elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically"

Front 5

The periodic law states that....

Back 5

similar properties recur periodically when elements are arranged according to increasing atomic number

Front 6

Who were the two chemists that came up with the periodic law?

Back 6

Dmitri Mendeleev and Lothar Meyer

Front 7

Bohr Model

Back 7

depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus

Front 8

Quantum Mechanical Model

Back 8

Uses complex shapes of orbitals (sometimes called electron clouds), volumes of space in which there is likely to be an electron.

Front 9

Quantum Mechanical Model and Bohr Model explain what?

Back 9

Theses models explain how electrons exist in atoms and how those electrons affect the chemical and physical properties of elements.

Front 10

Quantum Mechanical Model has such expanatory power that it is rarely questioned today. What are it's applications?

Back 10

Its applications include lasers, computers, and semiconductor devices, and it has led us to discover new ways to design drugs that cure disease.

THE FOUNDATION OF MODERN CHEMISTRY

Front 11

Interaction of light with atoms help what?

Back 11

Help shape both the Bohr and Quantum Mechanical Model.

Front 12

What is light?

Back 12

Light is a form of Electromagnetic radiation

Front 13

What light is not?

Back 13

Matter - it has no mass

Front 14

What is Electromagnetic Radiation?

Back 14

Type of energy that travels through space at a constant speed of 3.0X10^8 m/s

Front 15

Waterwaves

Back 15

Carry energy as it moves through water

Front 16

Waves are characterized by?

Back 16

WAVELENGTH

Front 17

What is wavelength?

Back 17

The distance between adjacent wave crests.

Front 18

What does a wavelength determine?

Back 18

COLOR

Front 19

What is white light and what dos it do?

Back 19

White light, as produced by the sun or light bulb, contains a spectrum of wavelengths and therefore a spectrum of colors

Front 20

Light Waves are also characterized by?

Back 20

FREQUENCY

Front 21

Define Frequency

Back 21

The number of cycles or crests that pass through a stationary point in one second.

Front 22

Wavelength and frequency are

Back 22

Inversely Related - the Shorter the wavelength the higher the frequency. The longer the wavelength the lower the frequency.

Front 23

Results of certain experiments could be explained only by describing light, not as waves, but as_________

Back 23

PARTICLES

Front 24

A particle of light is called

Back 24

Photon; a single packet of light energy

Front 25

The amount of energy carried int he packed depends on the wavelength of the light. The shorter the wavelength the __________ the energy.

Back 25

Greater

Front 26

The wavelength of electromagnetic radiation determines the ________________

Back 26

the amount of energy carried by one of its photons.

Front 27

ELECTROMAGNETIC SPECTRUM

Back 27

The entire range of electromagnetic radiation.

Front 28

Gamma Rays

Back 28

Shortest wavelength (and most energetic) photons

Front 29

Gamma rays are produced by

Back 29

SUN, STARS, and by certain unstable atomic nuclei on Earth. DANGEROUS and can DAMAGE BIOLOGICAL MOLECULES

Front 30

X-rays

Back 30

Pass through many substances that block visible light and are therefore used to image internal bones and organs.

They can also cause damage to biological molecules.

Increase cancer risk.

Front 31

Ultraviolet or UV light

Back 31

most familiar to us as the component of sunlight that produces a sunburn of suntan.

Can cause damage to biological molecules.

Risk of skin cancer

Front 32

Visible Light

Back 32

ranging from violet to red.

Do not damage biological molecules.

Front 33

Infrared light

Back 33

The heat we feel when we place a hand near a hot object.

Warm objects, including human bodies.

It is invisible to our eyes, but can be seen through night vision technology

Front 34

Microwaves

Back 34

used for radar and in microwave ovens.

Efficient with water and therefore heats substances that contain water.

Front 35

Radio Waves

Back 35

Used to transmit the signals by AM and FM radio, cellular telephones, television, and other forms of communication.