Chapter 2

Question 1

What is excitation?

Answer 1

Electrons in a atom are moved to a higher energy state without being removed from the atom

Question 2

What is the equation for velocity of all EM radiation ( speed of light)

Answer 2

C=3x10^8 m/sec

Question 3

What is electrical energy

Answer 3

•electricity

Results from movement of electrons in conductor

Question 4

What is electromagnetic energy (EM)

Answer 4

Combination of electric and magnetic fields traveling through space
(Wavelike energy disturbance)

Question 5

What are horizontal periods on the periodic table?

Answer 5

Elements that have the same number of electron shells

Question 6

What is electron binding energy? (Eb)

Answer 6

The amount of energy needed to remove an electron from the shell
(Unit of measure= eV electron volt)

Question 7

What are vertical groups on the periodic table?

Answer 7

The same number of valence electrons

Question 8

What is the atomic mass unit (AMU)

Answer 8

The mass of particles in the atom

Question 9

What is electromagnetic radiation

Answer 9

The natural part of the environment in which we live

Question 10

What is the atomic mass number

Answer 10

It is equal to the number of protons and neutrons in the nucleus

Question 11

What are shells

Answer 11

Energy level shells determined by the distance from the nucleus

Question 12

What is ionization

Answer 12

The process of adding or removing an electron

Question 13

What is energy(J)

Answer 13

Force used to do work

• Unit of energy joule (J)

Question 14

What is a wave

Answer 14

Electromagnetic energy that travels through space

Question 15

What are three x-ray properties

Answer 15

Electrically neutral, can ionize matter, Can travel at the speed of light

Question 16

What is the relationship between matter and energy

Answer 16

E=mc^2

Cannot be created or destroyed

Question 17

What is an ion

Answer 17

An atom that has gained or lost an electron

Question 18

What is the electromagnetic spectrum

Answer 18

Details of all various forms of electromagnetic radiation

Question 19

What is nuclear energy

Answer 19

Is obtained by breaking bonds between particles within the nucleus

Question 20

What is heat energy

Answer 20

Results from movement of molecules

Question 21

What is chemical energy

Answer 21

It is energy released from a chemical reaction

Question 22

What are two types of mechanical energy

Answer 22

Potential, kinetic

Question 23

What is the formula for work

Answer 23

Work =equals forcexdistance

Question 24

What is the formula for figuring out how many electrons are in each shell

Answer 24

2n^2

Question 25

What is an isotope

Answer 25

It is atoms that have the same number of protons but a different number of neutrons

Question 26

Where are electrons

Answer 26

They surround the nucleus and cannot be divided into smaller particles

Question 27

What is the nucleus

Answer 27

The center of an atom that contains protons and neutrons

Question 28

What are the two types of substances

Answer 28

* simple (element)- cannot be broken down/periodic table | * complex(compound)- Two or more elements chemically united in definite proportions

Question 29

What is a mixture

Answer 29

Two or more substances combined

Question 30

What is weight

Answer 30

The force an object exerts under gravity

Question 31

What is mass

Answer 31

The quantity of matter contained in the object | 

Question 32

What are the two branches of natural science

Answer 32

Physical and biological

Question 33

What is valence

Answer 33

The Chemical combining characteristic of an element determined by the number of electrons in the outermost shell

Question 34

What items can be divided into what three particles

Answer 34

Neutrons protons and electrons

Question 35

Where is the atomic weight and atomic number found on the elements on the periodic table

Answer 35

Atomic weight is found at the bottom of the element in the atomic number is found on the top or upper right hand corner of the element

Question 36

How are the elements listed on the periodic table

Answer 36

In ascending order based on their an atomic weight

Question 37

How many elements are on the periodic table

Answer 37

92 naturally occuring | 11 lab created

Question 38

What is the octet rule

Answer 38

An atom can never have more than eight electrons in the outer shell noble gases

Question 39

How do you find the number of protons in the nucleus

Answer 39

By looking at the atomic number at the top of the given element

Question 40

How do you figure the number of neutrons in the nucleus

Answer 40

By subtracting the atomic number from the atomic mass

Question 41

When you subtract the atomic number from the atomic mass what will it tell you

Answer 41

How many neutrons are in the nucleus

Question 42

What is the atomic number

Answer 42

The number of protons in the nucleus

Question 43

What is the symbol for atomic number

Answer 43

Z

Question 44

What charges do protons electrons and neutrons have

Answer 44

Neutrons neutral, protons positive, electrons negative

Question 45

Who discovered x-rays

Answer 45

Wilhelm Conrad

Question 46

What is a molecule

Answer 46

Two or more atoms that are chemically united

Question 47

What is the equation for velocity

Answer 47

Velocity=frequency x wavelength | V=v x A