Unit 7: Electron Structure And The Periodic Table

Question 1

Both light and electrons are understood to possess

Answer 1

A dual nature

Question 2

Light and electrons display behavior characteristic of both

Answer 2

Matter (as a particle) and energy ( as a wave)

Question 3

Electromagnetic radiation

Answer 3

Form of energy that exhibits wavelength behavior as it travels through space

Question 4

Energy scale

Answer 4

Low energy
- radio
-microwaves
-IR (infrared radiation)
-visible (ROYGBIV)
-uv
-x-rays
-gamma rays
High energy

Question 5

A wave is characterized by

Answer 5

3 properties

Question 6

Wavelength

Answer 6

Distance between 2 successive points in a wave

Question 7

Frequency

Answer 7

Number of waves that pass through a certain point in a given amount of time

Question 8

Speed

Answer 8

How fast the wave travels

Question 9

All electromagnetic radiation travels at

Answer 9

The sleep of light and requires no medium

Question 10

Particle nature of light

Answer 10

When an object that does not burn is heated, it emits massless particles called photons

Question 11

Photon

Answer 11

A “particle” of electromagnetic energy that can be absorbed or emitted

Question 12

A photon will be emitted when electrons in an atom

Answer 12

Form a higher energy state to a lower energy state

Question 13

When a photon is absorbed by an electron, it moves from

Answer 13

A lower energy state to a higher energy state

Question 14

Ground state

Answer 14

State of lowest energy ( most stable)

Question 15

Excited state

Answer 15

State which has higher potentials energy than the ground state electrons can be “excited” using many forms of energy including heat energy and chemical energy

Question 16

Atomic emission spectrum

Answer 16

The unique set of frequencies of waves emitted by atoms of an element

Question 17

Accepted portion of Bhor model

Answer 17

Energy of electrons is quantized

Question 18

Rejected portions of Bhor model

Answer 18

Electrons orbit around nucleus in regular circular patterns.
Exact location of the electron may be known

Question 19

Quantum mechanical model

Answer 19

• deals only with probability of fining a diver electron within a given region of space
• path of electron travel is unknown
• electron exist in certain energy levels: each sub level contains a certain number of “orbitals”

Question 20

To keep teams of electrons a unique set of

Answer 20

4 quantum numbers are assigned to each electron describing its energy state

Question 21

1st quantum number

Answer 21

Also known as “principle quantum number”
- analogous to rings of a Bhor model diagram
-#’s range from 1 through infinity
- the large #, the greater the distance from the nucleus and the greater energy of the electron may

Question 22

2nd quantum number

Answer 22

Specifies # of sub levels within each principal energy level AND the type of orbitals within the sub level

Question 23

S orbital

Answer 23

Hop up to 2 electrons

Question 24

P orbital

Answer 24

Hold up to 6 elections

Question 25

D orbital

Answer 25

Hold up to 10 electrons

Question 26

F orbital

Answer 26

Hold up to 14 electrons

Question 27

3rd quantum #

Answer 27

Specifies orientation of orbital in 3 dimensional space

Question 28

S sub levels have

Answer 28

1 possible orientation

Question 29

P sub levels have

Answer 29

3 possible orientations

Question 30

D sub levels

Answer 30

5 possible orientations

Question 31

F sub levels

Answer 31

7 possible orientations

Question 32

4 th quantum #

Answer 32

Electrons can spin clockwise Or counterclockwise

Question 33

In 1868 Dimitri Mendeleev arranged

Answer 33

The periodic table on the basic of the similar properties of elements

Question 34

Mendeleev arranged the elements according to

Answer 34

Increasing atomic mass