18.2 Comparing Atoms

Front 1

Substances made up of only one type of atom are called

Back 1

ELEMENTS

Front 2

What is the feature that distinguishes on element's atoms from another element's atoms?

Back 2

NUMBER OF PROTONS

Front 3

All atoms of the same element have the same number of

Back 3

PROTONS

Front 4

Atoms of different elements will have __ number of protons.

Back 4

A DIFFERENT

Front 5

Does a chemical reaction that breaks or forms bonds between atoms change the number of protons in the atom?

Back 5

NO

Front 6

The atomic number refers to the number of

Back 6

PROTONS

Front 7

An arrangement of elements in a table is called the

Back 7

PERIODIC TABLE OF ELEMENTS

Front 8

Atomic numbers increase by __ numbers.

Back 8

WHOLE

Front 9

What number describes the atomic nucleus?

Back 9

MASS NUMBER

Front 10

The mass number refers to the number of

Back 10

PROTONS PLUS NEUTRONS

Front 11

True or False: Atoms of the same element must have the same number of protons.

Back 11

TRUE

Front 12

True or False: Atoms of the same element must have the same number of neutrons.

Back 12

FALSE

Front 13

A subscript to the upper left of the symbol refers to the

Back 13

MASS NUMBER

Front 14

A superscript to the lower left of the symbol refers to the

Back 14

ATOMIC NUMBER

Front 15

The abbreviation for the name of an element is called

Back 15

CHEMICAL SYMBOL

Front 16

How do you determine the number of neutrons?

Back 16

MASS NUMBER MINUS ATOMIC NUMBER

Front 17

Different forms of the same element are called

Back 17

ISOTOPES

Front 18

Atoms of the same element with different numbers of neutrons are called

Back 18

ISOTOPES

Front 19

The chemical symbol written with the superscript and subscript numbers to the left is referred to as

Back 19

ISOTOPE NOTATION

Front 20

Hydrogen-1, Hydrogen-2 and Hydrogen-3 are examples of

Back 20

ISOTOPES

Front 21

In Hydrogen-2, the "2" refers to the

Back 21

MASS NUMBER

Front 22

How many protons in Hydrogen-3?

Back 22

1

Front 23

How many neutrons in Hydrogen-3?

Back 23

2

Front 24

How many electrons in Hydrogen-3 (if it is neutral)?

Back 24

1

Front 25

True or False: Protons in the nucleus repel each other.

Back 25

TRUE

Front 26

What holds the nucleus of the atom together?

Back 26

STRONG NUCLEAR FORCE

Front 27

True or False: Strong nuclear forces can only act on short distances within the atom.

Back 27

TRUE

Front 28

True or False: The repulsion of the protons for each other is greater than the strong nuclear force.

Back 28

FALSE

Front 29

The whole number in an element's box on the periodic table is the

Back 29

ATOMIC NUMBER

Front 30

The decimal number in an element's box on the periodic table is the

Back 30

ATOMIC MASS

Front 31

True or False: The atomic number increases by one whole number as you move from one element to the next on the periodic table.

Back 31

TRUE

Front 32

True or False: The atomic mass increases by one whole number as you move from one element to the next on the periodic table.

Back 32

FALSE

Front 33

What is the difference between the atomic mass and mass number?

Back 33

MASS NUMBER = mass for one isotope (whole number); ATOMIC MASS = mass taking into acount all isotopes (decimal number)

Front 34

True or False: Atoms are electrically neutral.

Back 34

TRUE

Front 35

True or False: Atoms can have unequal numbers of protons and neutrons.

Back 35

FALSE

Front 36

The location of the electrons outside the nucleus is referred to as the

Back 36

ELECTRON CLOUD

Front 37

The distance electrons are found from the nucleus is referred to as a(n)

Back 37

ENERGY LEVEL

Front 38

Atoms further from the nucleus have a __ energy state.

Back 38

HIGHER

Front 39

The first energy level can hold __ electrons.

Back 39

2

Front 40

The second energy level can hold __ electrons.

Back 40

8

Front 41

The third energy level can hold __ electrons.

Back 41

18

Front 42

In order to jump to a higher energy level, electrons have to __ energy.

Back 42

ABSORB

Front 43

When electrons fall back to their normal energy level, the __ energy in the form of __.

Back 43

RELEASE; LIGHT

Front 44

Energy levels are divided into smaller regions called

Back 44

ORBITALS

Front 45

The process of adding energy causing electrons to move into higher energy levels is called

Back 45

ELECTRON EXCITATION

Front 46

The release of energy as electrons to move into lower energy levels is called

Back 46

EMISSION

Front 47

True or False: All atoms release the same frequency of light during emission.

Back 47

FALSE