Kemistry Quez 1

Front 1

Who said the quote "Chemistry begins in the stars. The stars are the source of the chemical elements, which are the building blocks of matter and the core of our subject."?

Back 1

Peter Atkins

Front 2

Chemistry begins where?

Back 2

in the stars

Front 3

what is the source of chemical elements?

Back 3

the stars

Front 4

what are the building blocks of matter and the core of chemistry?

Back 4

chemical elements

Front 5

It can be a synonym of matter

Back 5

chemical

Front 6

it is anything that has mass

Back 6

chemical

Front 7

give some examples of everyday substances that is included as a chemical

Back 7

water, caffeine, sugar, elements on the periodic table, large molecules such as deoxyribonucleic acid (DNA), polymers such as plastics

Front 8

These are the building blocks that create the world surrounding us, whether they are naturally occurring or man-made

Back 8

Elements

Front 9

these are everywhere

Back 9

chemicals

Front 10

true or false: chemical-free products do exist

Back 10

false

Front 11

why does chemical-free products not exist? (1 paragraph minimum eme)

Back 11

because anything you touch is matter, and is therefore a chemical

Front 12

if you cannot pronounce the name of a chemical, is it bad for you? why or why not?

Back 12

No, it is not bad for you. The names of chemicals does not relate to how hazardous they are or to their origin

Front 13

true or false: chemists can produce natural products synthetically in their labs

Back 13

true

Front 14

the dangers of products depends on ___, but not their origin

Back 14

their structure

Front 15

true or false: synthetic products created in laboratories are more hazardous than chemicals found in nature

Back 15

false: they are not necessarily more or less hazardous

Front 16

It is a powerful and innovative tool, yet it has to be used wisely

Back 16

Chemistry

Front 17

It is defined as a material which cannot be broken down or changed into another substance using chemical means.

Back 17

Element

Front 18

It may be thought of as the basic building blocks of matter

Back 18

Element

Front 19

It is a substance consisting of only one type of atom.

Back 19

chemical element/element

Front 20

The identity of a chemical reaction cannot be changed by any ___

Back 20

chemical reaction

Front 21

Only a ___ can transmute one element into another one

Back 21

nuclear reaction

Front 22

what do elements consist of?

Back 22

Subatomic particles

Front 23

elements = what?

Back 23

atoms

Front 24

There are how many known elements?

Back 24

118

Front 25

All matter consists of particles called ___

Back 25

atoms

Front 26

atoms bond to each other to form ___

Back 26

elements

Front 27

elements contains only how many kinds of atom/s

Back 27

only one kind

Front 28

Atoms of different elements form ____

Back 28

compounds, molecules, and objects

Front 29

what are the parts of an atom

Back 29

electron, protons, neutrons

Front 30

___ have a positive electrical charge and are found together with neutrons in the nucleus of each atom

Back 30

protons

Front 31

___ have no electrical charge and is found in the nucleus of each atom

Back 31

Neutrons

Front 32

___ orbits the nucleus

Back 32

Electrons

Front 33

These are the smallest particles that make up elements

Back 33

Atoms

Front 34

Atoms bonded together form what?

Back 34

Compounds

Front 35

An ___ is a basic chemical building block of matter

Back 35

Atom

Front 36

Only ___ can break apart atoms

Back 36

Nuclear reactions

Front 37

What are some examples of nuclear reactions

Back 37

Radioactive decay and nuclear fission

Front 38

chemicals = what?

Back 38

matter

Front 39

Chemical reactions involves what?

Back 39

The electrons of an atom

Front 40

Nuclear reactions involves what?

Back 40

the nucleus of an atom (protons and neutrons)

Front 41

reaction can be shortened to what?

Back 41

rxn

Front 42

chemical or nuclear rxn?: one substance is converted to another, but atoms never change identity

Back 42

Chemical rxn

Front 43

chemical or nuclear rxn?: only electrons take part in the rxn

Back 43

Chemical rxn

Front 44

chemical or nuclear rxn?: only a small amount of energy is evolved during the reaction

Back 44

chemical rxn

Front 45

chemical or nuclear rxn?: reaction rates are influenced by temperature, concentration and catalyst

Back 45

chemical rxn

Front 46

chemical or nuclear rxn?: atoms of one element are converted into atoms of another element

Back 46

nuclear rxn

Front 47

chemical or nuclear rxn?: the nucleus of an element takes part in the reaction

Back 47

nuclear rxn

Front 48

chemical or nuclear rxn?: reaction rates depend on the concentration of the element, but are not influenced by temperature, or catalysts

Back 48

nuclear rxn

Front 49

What are the reaction rates of a chemical reaction influenced by?

Back 49

temperature, concentration, and catalyst

Front 50

What are the reaction rates of a nuclear reaction influenced by?

Back 50

concentration of the element only

Front 51

What are the 2 fundamental nuclear processes involved in creating new chemical elements

Back 51

fusion and fission

Front 52

these are both nuclear phenomena that release a large amount of energy

Back 52

Nuclear fusion and fission

Front 53

It is a process where a small nuclei are forced together to form a nucleus

Back 53

Fusion

Front 54

What are forced together to form a nucleus?

Back 54

small nuclei

Front 55

It is where a large nucleus is broken down into simpler pieces to make lighter elements

Back 55

Fission

Front 56

The abundance of chemical elements in the universe is dominated by the large amounts of hydrogen and helium which where produced in what?

Back 56

the big bang

Front 57

Remaining elements, making up only 2% of the universe, were largely produced by certain ___ and ___

Back 57

supernovae and certain red giants

Front 58

These three elements are rare because although they are produced by nuclear fusion, they are then destroyed by other reactions in the stars

Back 58

Lithium, beryllium, and boron

Front 59

Why are lithium, beryllium, and boron rare?

Back 59

Because they are destroyed by other reactions in the stars after being produced

Front 60

the elements from carbon to iron are relatively more common in the universe because of the ease of making them in ___

Back 60

supernova nucleosynthesis

Front 61

Elements of higher atomic number than iron (element 26) become progressively more rare in the universe. Why?

Back 61

Because they increasingly absorb stellar energy in being produced

Front 62

Each element may be represented by its __ or __

Back 62

atomic number or symbol

Front 63

true or false: the names and symbols for the elements are always the same in common use in various countries.

Back 63

false: it may be different

Front 64

Of the 118 known elements, how many are known to occur naturally on Earth?

Back 64

94

Front 65

elements that don't naturally occur on Earth are called what?

Back 65

synthetic elements

Front 66

The numbers of neutrons in an element determines its ___

Back 66

isotope

Front 67

we are how many percent star stuff and water

Back 67

38% star stuff and 53% water

Front 68

who said the quote "The meeting of 2 personalities is like the contact of 2 chemical substances: if there are any reaction, both are transformed."

Back 68

C.G. Jung

Front 69

chemical or nuclear rxn?: a large amount of energy is evolved during the reaction

Back 69

nuclear rxn

Front 70

The IUPAC has agreed on a set of names and symbols for the elements. What does IUPAC stand for?

Back 70

The International Union of Pure and Applied Chemistry

Front 71

The IUPAC has agreed on a set of names and symbols for the elements. What does IUPAC stand for?

Back 71

The International Union of Pure and Applied Chemistry

Front 72

chemical or nuclear rxn?: a large amount of energy is evolved during the reaction

Back 72

nuclear rxn

Front 73

how many years ago did the big bang happen?

Back 73

13.7 billion years ago

Front 74

how many years later did hydrogen atoms and molecules appear after the big bang

Back 74

370,000 years later