Ch. 5 Electrons In Atoms

Question 1

Electromagnetic radiation

Answer 1

Is a kind of energy that behaves like a wave that travels through space

Question 2

Ex of electromagnetic radiation

Answer 2

1. Light
2. X- Rays
3. Radio waves
4. Microwaves

Question 3

All waves can be characterized by their:

Answer 3

1. Wavelength
2. Amplitude
3. Frequency
4. Speed

Question 4

Wavelength

Answer 4

The shortest distance between equivalent points on a continuous wave

Question 5

Amplitude

Answer 5

The height of a wave from the origin to a crest or from the origin to a trough

Question 6

Frequency

Answer 6

Is the number of the waves that pass a given point in one second

Question 7

Hertz

Answer 7

Is the SI unit for frequency, which is equivalent to one wave per second

Question 8

Quantum

Answer 8

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

Question 9

According to plancks theory, for a given frequency, v, matter can emit or absorb energy only in

Answer 9

Whole number multiples of HV

Question 10

Photoelectric effect

Answer 10

Is the phenomenon In which electrons are emitted from a metals surface when light of a certain frequency shines on it

Question 11

Photon equation is

Answer 11

Ephoton = HI

Question 12

True or false ?

Like the visible spectrum an atomic emission spectrum is a continuous range of colors

Answer 12

False

Question 13

True or false ?

Each element has a unique atomic emission spectrum

Answer 13

True

Question 14

True or false ?

A flame test can be used to identify the presence of certain elements in a compound

Answer 14

True

Question 15

True or false ?
The fact that only certain colors appear in an elements atomic emission spectrum indicates that only certain frequencies of light are emitted

Answer 15

True

Question 16

True or false ?

Atomic emission spectra can be explained by the wave model of light

Answer 16

False

Question 17

True or false ?

The neon atoms in a neon sign emit their characteristic color of light as they absorb energy

Answer 17

False

Question 18

True or false ?

When an atom emits light photons having certain specific energies are being emitted

Answer 18

True

Question 19

Ground state

Answer 19

The lowest allowable energy state of an atom

Question 20

Bohrs model of the atom predicted

Answer 20

Frequencies of the lines In hydrogens atomic emission spectrum

Question 21

According to bohrs atomic model, the smaller an electrons orbit

Answer 21

The lower the atoms energy level

Question 22

According to bohrs atomic model the larger an electrons orbit

Answer 22

The higher the atoms energy level

Question 23

Bohrs proposed that when energy is added to a hydrogen atom

Answer 23

It’s electron moves to a higher energy orbit

Question 24

According to bohrs atomic model, the hydrogen atom emits a photon corresponding to

Answer 24

The different energy levels associated with the two orbits in transitions between

Question 25

Bohrs atomic model failed to explain

Answer 25

The atomic emission spectrum of elements other than hydrogen

Question 26

Heisenberg uncertainty principle

Answer 26

Stated that it is impossible to know both the velocity and the position of a particle of the same time

Question 27

Schrodinger wave equation

Answer 27

Originally applied to hydrogen atom it led to the quantum mechanical model of the atom

Question 28

Quantum mechanical model of the atom

Answer 28

The modern model of the atom that treats electrons as waves

Question 29

Atomic orbital

Answer 29

A three dimensional region around the nucleus representing the probability of finding an electron

Question 30

Atomic orbitals _____ have an exactly defined size

Answer 30

Don’t

Question 31

Each orbital may contain at most _____ electrons

Answer 31

2

Question 32

All “s” orbitals are ______ dumbbell shaped

Answer 32

Spherically shaped

Question 33

A principle energy has ____ energy sub levels

Answer 33

N

Question 34

The maximum number of _______ related to each principle energy level equals 2n2

Answer 34

Electrons

Question 35

There are ____ equal energy p orbitals

Answer 35

Three

Question 36

Hydrogens principle energy level 2 consist of _________ and ______ orbitals

Answer 36

2s and 2p

Question 37

Hydrogens principle energy level 3 consist of ___ orbitals

Answer 37

9

Question 38

Electron configuration

Answer 38

Is the arrangement of electrons in an atom

Question 39

Electrons in an atom tend to assume the arrangement that gives the atom ________ possible energy

Answer 39

Lowest

Question 40

This arrangement of electrons is the most_____ arrangement also called the atoms ___________

Answer 40

1. Stable

2. Ground state electron configuration

Question 41

Aufbau principle

Answer 41

States that each electron occupies the lowest energy orbital available

Question 42

Pauli exclusion principle

Answer 42

States that the maximum of two electrons may occupy a single atomic orbital but only if the electrons have opposite SPINS

Question 43

Hunds rule

Answer 43

States that single electrons with the same spin must occupy each equal energy orbital before additional electrons with opposite spins occupy the same orbitals

Question 44

Valence electrons

Answer 44

The electrons in an atoms outermost orbitals

Question 45

In an electron dot structure the elements symbol represents

Answer 45

Atoms nucleus and inner level electrons

Question 46

Which electrons are represented by the dots in an electron dot structure ?

Answer 46

Valence electrons