What does mass number represent?

The number of protons and neutrons in an atom

Compound formed from ionic bonds

Determined that electrons existed and that are were negative

Min amount of energy that can be gained or lost by an atom

What is stoichiometry?

The study of mass relations in a chemical reaction, A really cool word

Anything that has mass and takes up space

Atoms will +, - or share electrons to make a complete shell

How is size of an atom determined?

Volume occupied by the electrons around the nucleus

What does atomic mass represent?

The number of protons in an atom on the periodic tbale

What is the equation for percent yield?

Actual yield/ theoretical yield * 100

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Chemistry

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Questions 86

Answers

1
Mass is measured in...
C/K
S
G
M
2
What does mass number represent?
The number of neutrons and electrons in an atom
The number of protons and neutrons in an atom
The number of protons and electrons in an atom
3
Levels in electron configuration are...
S,P,D,F
P,D,S,E
F,S,D,A
4
Where are metals located on the Periodic Table?
To the right
Touching
To the left
5
What is a molecule?
Compound formed from ionic bonds
Compound formed from chemical bonds
6
What is a product of combustion?
Pure carbon
Pure oxygen
Water
Pure nitrogen
7
JJ Thompson
performed gold foil experiment
Created Particle Theory
Determined that electrons existed and that are were negative
Discovered that protons were in the nucleus of elements
8
What is a quantum?
Max amount of energy that can be gained or lost by an atom
Min amount of energy that can be gained or lost by an atom
9
An example of physical change is...
Changing color
Cutting paper in half
Producing heat
Producing gas
10
Na+Cl→NaCl is an example of _ type of reaction
Combustion
Double replacement
Synthesis
Single replacement
11
What is stoichiometry?
The study of mass relations in a chemical reaction
Geometry and chemistry
The study of how chemistry is preformed
A really cool word
12
What is matter?
Anything that has mass and takes up space
Elements
Atoms
Stuff
13
To get from atoms to moles you must ...
Divide by 6.02x10^23
Divide by molar mass
Multiply by 6.02x10^23
14
The product of Zn+CuCl₂ is...
ZnCl2+Cu
ZnCu+ Cl2
Cu2+ZnCl
Zn+Cl2Cu
15
Isotopes have varying...
Hyphens
Atomic number
Atomic Mass
Symbol
16
Synthesis is represented as...
AX→A+X
A+X→AX
17
Which does not indicate a chemical reaction?
Change in color
Production of heat
Change in state
Production of gas
18
Octet rule is...
Atoms will only - electrons to reach a complete shell
Atoms will only gain electrons to reach a complete shell
Atoms will +, - or share electrons to make a complete shell
19
What does the number at the bottom of each square on the Periodic Table represent?
Atomic mass
Number of protons
Atomic number
Which group it is in
20
Weighted average mass of the naturally occurring isotope of an element on the periodic table is
The average total mass
The average atomic mass
The total number of isotopes
21
Density is measured in...
G
Mass/Volume
M
heavyness
22
Which group are Halogens?
3
17
6
1
23
Length is measured in...
g
m
s
moles
24
Which element is the cation: NaCl
Na
Cl
25
To get from moles to mass you must...
Multiply by 6.02x10^23
Multiply by molar mass
Divide by molar mass
26
Actual yield is...
What was formed in a lab
What stoichiometry tells you what should have formed
27
Diatomic elements must...
always be in 3's
never have a charge
are single
always be in 2's
28
How is size of an atom determined?
Volume occupied by the electrons around the nucleus
Average Atomic mass
Atomic mass
29
Which group are Transition Metals?
3-12
5-10
13-18
7-9
30
A form of energy that exhibits wavelike behavior as it travels through space is...
Negative radiation
Wave lengths
Electromagnetic radiation
31
Who performed the gold foil experiment
Ernest Rutherford
Einstein
Dalton
Me
32
Multiply mass by % for each then add masses together and divide by 100 are the steps to find
Average atomic mass
Average atomic protons
Number of protons
Average atomic weight
33
How is indirect measurement measured?
Comparing it to something else
Measuring mass and volume
34
Volume is measured in..
L*H*W
Space
Air
Moles
35
Sharing of electron pairs is...
metallic
Covalent bonding
Ionic bonding
36
To abbreviate configurations...
To back to closest metalloid
To back to closest noble gas
To back to hydrogen
Go forward to closest noble gas
37
Atomic radium _ across from left to right and _ down a group...
Increases and decreases
Decreases and increases
38
What does atomic mass represent?
The number of neutrons in the nucleus
The reactivity of an element
The number of protons in an atom on the periodic tbale
The number of electrons an element has
39
Who created the Particle Theory of Matter
Thompson
Me
Democritis
Dalton
40
What is the atomic symbol for Lead?
Pb
Au
Le
Ld
41
The study of the composition structure and properties of matter and the changes it under goes
Anatomy
Chemistry
Science
Bio
42
How many moles are in 124g of Calcium Sulfate
2 moles
.67 moles
.91 moles
1 mole
43
How does an element get from ground state to excited state?
Releases energy
Absorbs energy
44
Amount is measured in...
G
C/K
S
Moles
45
What is the equation for percent yield?
Theoretical yield/ actual yield * 100
Actual yield/ theoretical yield * 100
100* molar masses/ actual yield
46
Ionic compounds are made from _ bonds
Ionic
Chemical
Metallic
47
What would be the product of be: C₃H₈+5O₂
8HO+3C
8H2O+5CO
H2+CO
4H2O+3CO2
48
Cations and anions must...
Anions are higher
Cancel
Cations are higher
49
Which group are Noble Gasses?
17
4
3
18
50
In metals reactivity _ down a group and _ from left to right
Increase and decrease
Decrease and increase
51
Which group are Earth Metals?
19
7
2
1
52
Elements are...
Legos
Atoms
Substances made of two or more elements
Pure substances made of one kind of an atom
53
Which is not a characteristic of a chemical reaction?
Conservation of mass must be upheld
Equation must represent all known facts
Equation must contain formulas for all substances
Equation must have at least 6 elements balanced
54
For something to float in water
It must be less dense
It must be more dense
55
Ionization _ across a period and _ down a group
Increases and decreases
Decreases and increases
56
As _ increases _ decreases
time and space
wavelength and frequency
frequency and wavelength
57
Is a group horizontal or vertical?
Verticle
Horizontal
58
Which is not one of the three basic laws of chemistry published in the 1790's?
Law of gravity
Law of conservation of mass
Law of definite proportions
Law of multiple proportions
59
Which element is not diatomic?
I
Cl
He
Br
60
What is mass?
The number of neutrons in an element
Weight
A measure of the amount of matter
The number of protons in an element
61
Are periods vertical or horizontal?
Horizontal
Vertical
62
To find the molar mass of a compound...
Multiply molar masses then divide by the number of elements
Add up individual molar masses
63
Temperature is measured in...
L*H*W
G
C/K
Moles
64
Solids have a...
Definite volume and indefinite shape
Definite shape and volume
Indifinite shape and volume
65
Where are metalloids located on the Periodic Table?
To the right of the stair step
To the left of the stair step
Touching the stair step
66
Emissions of light is related to?
Behavior of electrons
Behavior of neutrons
Behavior of protons
67
Which group are Alkali Metals?
1
2
18
5
68
Which equation represents double replacement?
A+BX→B+AX
AX+BY→AY+BX
69
What is ionization?
Time necessary for iron to rust
Energy required to remove an electron from a gaseous atom
70
Who explained the laws of chemistry with Atomic Theory?
Mrs Krones
Dalton
Rutherford
Democritus
71
What are isotopes?
Atoms of the same element with different properties
Comparison of two different atoms
Relationship between Atomic number and element
Two different elements
72
What is the density of water?
1.09ML
1.5ML
3ML
2.5ML
73
Where are nonmetals located on the Periodic Table?
To the left of the stair step
Touching the stair step
To the right of the stair step
74
Time is measured in...
S
M
Moles
G
75
Compounds are made of...
Two or more elements
One kind of element
76
Reactivity is...
How unlikely an atom is to react with another substance
How likely an atom is to react with another substance
77
What is not needed for hyphen notation?
isotope notation
Nuclear notation
Mass notation
Nuclear symbol
78
How many cations are in a double replacement question?
2
4
3
1
79
In metalic bonding _ atoms bond
Solids
Gas
Metals
Water
80
Intensive means?
Independent amount of mater
Dependent amount of matter
81
Cations are...
Negative
Pawsitive
82
Balance the equation: NaC
Na4C
NaC4
4NaC
NaC
83
Select all that apply- What are the steps to determine empirical formulas?
Divide by smallest to determine ratio
Convert to moles of each component
Determine mass of each component
Assume 100g of sample
84
How are elements arranged?
Electron Configurations
Neutron configuration
85
The reaction that limits the production of the reaction is?
Excess reactant
Limiting reactant
86
A bond mutual attraction of valance electrons of one atom to the nucleus for another that bonds
Mental bond
Chemical bond
Physical bond

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