Chapter 7

Question 1

The vertical distance from the midline of a wave to the peak or trough

Answer 1

Amplitude

Question 2

The number of waves that pass through a particular point in 1 second

Answer 2

Frequency

Question 3

The speed of a wave

Answer 3

U = lamda x v

Question 4

Proposed that visible light consist of electromagnetic waves

Answer 4

Maxwell 1873

Question 5

In the visible light consist of electromagnetic waves…(2 components)

Answer 5

Electric field component and magnetic field component

Perpendicular to one another

Question 6

The emission and transmission of energy in the form of electromagnetic waves

Answer 6

Electromagnetic radiation

Question 7

Speed of light

Answer 7

3.00x10^8 m/s

Question 8

What we can see small part of electromagnetic spectrum

400-700 nanometer

Answer 8

Visible light

Question 9

Electro attic radiation

Answer 9

Lamda x v =c

Question 10

A photon has a frequency of 6.0x10^4 Hz. Convert into wavelength

Answer 10

Lamda = c/v

3.00x10^8 m/s / 6.0x10^4 Hz

Convert to nanometer

Question 11

What did max planch (1900) discover?

Answer 11

-when solids are heated, they emitted electromagnetic radiation over a wide range of wavelength

Question 12

Radiant energy emitted by an object at a certain temperature depends on its____

Answer 12

Wavelength

Question 13

Energy is emitted or absorbed in discrete units called____

Answer 13

Quantum

Question 14

Planch’s constant

Answer 14

h=6.63x10^-34 Js

Question 15

Photoelectric effect 1905

Answer 15

• Einstein
• metals emit electrons when exposed to light
• light has both wave nature and particular nature

Question 16

A particle of light

Answer 16

Photon

Question 17

Finger prints for atoms

Answer 17

Line spectra

-excited by a high energy discharge, the light will pass through a prism

Question 18

Bohr’s model of the atom 1913

Answer 18

• electrons can only have specific (quantinize) energy values
• light is emitted as electron moves from one energy level to a lower energy level

Question 19

En=-RH(1/n^2)

What is n and R?

Answer 19

R= rydburg constant 2.18x10^-18 J

n = principal quantum number - integers (1, infinity)

Question 20

4 scenes of transitions of the hydrogen atom from higher energy levels to lower energy levels

Answer 20

E (n=1) - Lymdn
E(n=2)- balmer
E(n=3)- paschen
E(n=4)- bracket

Question 21

wavelength can’t be _____

Answer 21

Negative

Question 22

Why is energy quantinized?

Answer 22

De broglie (1924) reasoned that electron is both particle and wave

h/mu

Question 23

Schrodinger wave equation

Answer 23

An equation that described both the particle and wave nature of the electron

Question 24

Schrodingers equation can only be exactly solved for ___ atoms. An approximate solution is used for multi electron systems.

Answer 24

Hydrogen

Question 25

Wave function: 1. 2.

Answer 25

1. Energy of electrons with a given wave function | 2. (Wave function (sigh))^2 is the probability of finding electrons in a volume of space

Question 26

Sigh is a function of 4 numbers called _____

Answer 26

Quantum numbers (n, l, m, ms) | m sub s

Question 27

Quantum number n =

Answer 27

Distance of electron from the nucleus

Question 28

90% of the electron density is found for the___

Answer 28

1s orbital

Question 29

Quantum number l=

Answer 29

Angular momentum quantum number **** l=n-1

Question 30

When n= 1 n=2 n=3 L=?

Answer 30

l= 0 l= 0 or 1 l=0,1 or 2

Question 31

l=0 l=1 l=2 l=3 What orbital?

Answer 31

``` 0 = s orbital 1= p orbital 2= d orbital 3= f orbital ```

Question 32

L represents ....

Answer 32

Shape of the volume of space that the electron occupies

Question 33

Pauli exclusion principle

Answer 33

No 2 electrons in an atom can have the same 4 quantum numbers

Question 34

Electrons with the same value of n

Answer 34

She'll

Question 35

Electrons with the same values of n and l

Answer 35

Subshell

Question 36

Electrons with the same values of n l and ml

Answer 36

Orbital

Question 37

How many electrons can an orbital hold?

Answer 37

2 electron (with opposite spin)

Question 38

"Fill up" electrons in lowest energy orbitals

Answer 38

Aufbau Principle

Question 39

The most stable arrangement of electrons in Subshell is the one with the greatest number of parallel spins

Answer 39

Hund's rule

Question 40

What are the possible quantum numbers for the last (outermost) electron in Cl?

Answer 40

N=3 L=1 Ml=-1,0,1 Ms= 1/2, -1/2

Question 41

What is the electron configuration of Mg?

Answer 41

1s^2 2s^2 2p^6 3s^2 Abbreviation: [Ne] 3s^2

Question 42

Unpaired electrons

Answer 42

Paramagnetic

Question 43

All electrons paired

Answer 43

Diamagnetic

Question 44

The distance between identical points on successive waves

Answer 44

Wavelength (lamda)