Define Oxidation Number:

Indicates how many electrons are lost, gained, or shared.

What is a decomposition reaction?

Compounds break down into simpler products

What is the fourth step to balancing a chemical equation?

Balance atoms one at a time by adjusting coefficients.

What are valence electrons?

the electrons in the outermost energy level

Is a synthesis reaction also a single displacement reaction?

No, it is just a synthesis reaction

What are biochemical reactions

chemical reactions that take place inside the cell

According to the Heisenberg Uncertainty Principle.

If you know location then velocity is uncertain & vice versa

A few of the alpha particles were deflected, so Rutherford concluded that the atom contains ___

a concentrated area of positive charge

process of combining smaller parts to make a larger product

Definition of Lewis Dot Structure?

representation of a molecule to show electron position.

smallest prtcle of an element that still has it's properties

What law is the rational for balancing chemical equations?

the law of conservation of mass

What are Ionic Compounds?

Ionic compounds are molecules that are Ionic bonded.

What is double displacement?

A reaction that involves an exchange of positive ions

What is a decomposition reaction?

Product yields reactants, H2O ▶️ H2 + O2

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Chemistry

99 termsStudBud Administration27 plays

CRB midterm review

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Questions 99

Answers

1
single bonds share...?
4 electrons
123456789 electrons
2 electrons
1 electron
2
Electrons...
Are in the nucleus of the atom
React with things
Go around the atom
3
Which is the correct Lewis Dot Structure?
G
D
E
F
4
Define Oxidation Number:
Indicates how many electrons are lost, gained, or shared.
Indicates how many electrons are lost, gained or transferred
There is no such thing as "Oxidation numbers" in science.
THIS IS THE CORRECT ANSWER
5
How many protons will this element have?
7
6
5
12
6
What is a decomposition reaction?
2 or more elements in different compounds trade places
More energy is needed to break the bonds of the reactants
Compounds break down into simpler products
≥ 2 elements /compounds mix to make a more complex substance
7
Which of the following did Dalton NOT create?
Stoichiometry
Dalton's Law
Theory of Relativity
Atomic Theory
8
The products of a complete combustion reaction are ....
Carbon Dioxide and Water
Carbon Monoxide and Water
Carbon Monoxide, Carbon Dioxide and Water
Carbon and Water
9
What is the fourth step to balancing a chemical equation?
List elements in the equation
Write without the coefieciants
Check number of atoms of each side
Balance atoms one at a time by adjusting coefficients.
10
How many configurations, or shapes, can a "s" orbital have?
2
1
3
5
11
Atomic # , protons : oxygen
15.999
204.383
208.980
12.011
12
What are valence electrons?
the electrons in the outermost energy level
the electrons in the innermost energy level
13
How do you identify the number of valence electrons?
Period Number
Periodic Number
Atomic Number
Group Number
14
Which is NOT a binary molecular compound
NH3
H2S
Cl2
NO3
15
Ionic compounds are not
Highly reactive
Found in nature
Solid at room temperature
Good conductors in water or in liquid form
16
Name that Bohr Model!
Flourine
Sodium
Magnesium
Neon
17
WHO CREATED THE LEWIS DOT STRUCTURE?
GILBERT N. LEWIS
JOHN DALTON
CHRISTOPHER COLUMBUS
DMITRI MENDELEYEV
18
Is a synthesis reaction also a single displacement reaction?
No, it is just a synthesis reaction
Yes
It depends
No, it is a double displacement
19
What are biochemical reactions
chemical reactions that take place inside the cell
The burning of methane gas
breakdown of molecules into smaller units and release energy
Exothermic reactions that take place in organisms
20
Protons have a _________ charge?
Negative
Positive
21
Is this a Lewis Dot or Bohr Diagram?
Bohr Diagram
Lewis Dot Diagram
22
What are the two types of bonds?
Ionic, Covalent
Molecular, Ionic
Hot Dogs, Hamburgers
Exothermic, Endothermic
23
What is special about a Bohr model?
It shows all the electrons
It portrays ionic bonds
It portrays covalent bonding
It only shows the outer shell of an atom
24
True or False? When balancing chemical equations subscripts can change.
Idk
False
True
25
what is in the middle of an electron cloud
the Avengers
Blue Face
Protons and nuetrons
protons and electrons
26
What is wrong with this Lewis Dot Structure?
Too Few Dots
Dots in Wrong Place
Wrong Element
Too many Dots
27
How many configurations, or shapes, can an "p" orbital have?
3
1
5
6
28
Ionic Bond
M+M
None of the above
M+NM
NM+NM
29
The following reaction is a.......
Acid-Base
Combustion
Single Replacement
Redox
30
What did Ernest Rutherford discover about the atom?
The atom is a sphere
The charge of the electron
The electron
The nucleus of the atom
31
Which orbital has 3 orientations?
f orbital
s orbital
d orbital
p orbital
32
According to the Heisenberg Uncertainty Principle.
If you know location then velocity is uncertain & vice versa
never cook methamphetamine
electrons have well-defined orbits
location and velocity are easy to measure at the same time
33
magnesium has ___ protons
6
19
12
18
34
What element has the most protons?
Hydrogen
Darmstadtium
Roentgenium
silicon
35
A few of the alpha particles were deflected, so Rutherford concluded that the atom contains ___
a concentrated area of negative charge
mostly empty space
orbiting electrons
a concentrated area of positive charge
36
Synthesis is
process of combining negatively charged particles together
process of combining smaller parts to make a larger product
process of splitting apart things larger into smaller pieces
the process of generating new cells
37
Definition of Lewis Dot Structure?
representation of Neutrons
model used to show the importance of chemistry
representation of atomic bombs
representation of a molecule to show electron position.
38
What is a synthesis reaction?
AB + C --> CB + A
A + B + C --> CBA
A + B --> AB
AB --> A + B
39
What is an atom?
something that cannot be broken down anyfarther
A man
smallest prtcle of an element that still has it's properties
smallest prtcle of an element that has different properties
40
What type of orbital is pictured below?
p
f
d
s
41
Ionic compounds form a crystallize structures
True
False
42
The Bohr Model focuses on electrons?
False
True
43
What law is the rational for balancing chemical equations?
bill nye
the law of proper distribution of volume
the law of conservation of mass
the law of equal properties
44
Protons...
Have no charge
Orbit the nucleus
Serve as a buffer
Are positively charged
45
What are Ionic Compounds?
Ionic compounds are linus’ s football
Ionic compounds are molecules that are Ionic bonded.
They are Ionic and covalent compounds
Ionic molecules are Ionic compounds
46
What is double displacement?
A reaction that involves an exchange of positive ions
Two substances react to form one substance
47
What is the second step to balancing a chemical equation?
Check number of atoms of each side
Write without the coefficients
Balance atoms one at a time by adjusting coefficients.
List elements in the equation
48
How many electrons are in this element?
208
84
125
209
49
Which of the following could have the Lewis Dot Diagram illustrated?
aluminum
fluorine
radon
oxygen
50
What type of orbital is pictured below?
f
p
s
d
51
What is a decomposition reaction?
A reverse synthesis
Product yields reactants
An inverse synthesis
H2O ▶️ H2 + O2
52
Which numbers can never be changed when balancing a chemical equation?
room numbers
coefficients
subscripts
cell numbers
53
which of the following is not Double displacement?
3 Mg + 1 Fe2O3 -> 2 Fe + 3 MgO
3 NaBr + 1 H3PO4  1 Na3PO4 + 3 HBr
2 NH3 + 3 I2 -> 1 N2I6 + 3 H2
3 Ca(OH)2 + 1 Al2(SO4)3 -> 3 CaSO4 + 2 Al(OH)3
54
Which of following equation describes single displacement reaction?
A + B --> AB
AB + C --> AC + B
AB --> A + B
AB + CD --> AC + BD
55
What are the 2 types of chemical reactions?
Double Displacement, Single Displacement.
Decomposition reaction, Synthesis / Direct Combustion.
Direct Displacement, Double Combustion.
Decomposition Displacement, Combustion Reaction.
56
Name that Bohr Model
Aluminum
Sodium
Magnesium
Potassium
57
This orbital notation diagram shows the element__
N
C
F
O
58
Ionic Compounds have high melting points...
True
False
59
These shapes correspond to what orbital?
p
d
s
f
60
What is a combustion reaction?
When a substance combines with oxygen and releases energy
When a substance combines with water and releases energy
When a substance combines with carbon and releases meth
When two substances combine
61
Who was John Dalton?
A Chemist
a Physicist
All of the above
a Meteorologist
62
Which ion is polyatomic?
Na+
OH-
Cl-
NaCl
63
What is the Name of this Binary Compound (CaCl2)?
Calcium Chlorinide
Calcium Chloride
Calcium Chlorineideineide
Chlorine Calcide
64
Which model of the atom did scientists use prior to Rutherford's experiment?
Plum Pudding - Thomson
Rutherford Model
Planetary - Bohr
Billiard Ball - Dalton
65
John Dalton believed that...
Atoms have positive and negative particles
Atoms can be seen through microscope
Atoms are spheres with different masses and sizes
Atoms can be divided into smaller parts
66
What did Dalton conclude about oxygen?
The atom must be 5.6 times larger than a hydrogen atom.
Its boiling point is -297.3 °F.
Its atomic number is 8.
Its atomic mass is 15.99 amu.
67
What was Rutherford trying to prove?
Electron Cloud Model
Dalton's Atomic Theory
Plum Pudding Model
Planetary Model
68
Chemical equations are written
reactants ---> products
reactants + products
products = reactants
products + reactants
69
What is a synthesis reaction?
H2+O2=H2O(2)
2+ reactants yield 1 product
Two reactants yield one product
Two reactants yield two products
70
How many configurations, or shapes, can a "d" orbital have?
5
3
10
1
71
What are chemical reactions
amount of an element that is at the end was at the beginning
the amount of energy the organism uses
process that changes substances into other substances
allows the cells function properly, and maintain life
72
What are the 4 orbital shapes?
s g d f
s p d f
s p d k
c p d f
73
Why does this reaction occur?
Because one element is more reactive than another
because elements need ions
Because one element is less reactive than another
74
electron cloud
change of one substance into a new substance
atoms electrons are mos likely to be found
change of 1 substance into a new substance
heterogeneous mixture whose particles neer settle
75
Is this a double displacement?
Yeah
No
76
Heisenberg Uncertainty Principle proposes
The variation in Y and X axis where a particle may be.
that light will still slip away even if one catches up to it
a variation of the wave collinearity.
the time for electron to travel one light year
77
Rutherford figured out that the atom is made of mostly empty space.
True
False
78
a FULL 2p orbital would be shown like this ___
2p3
2p6
2p4
2p2
79
This is a Lewis dot structure for?
Polonium
Platinum
Potassium
Phosphorus
80
Where are valence electrons located?
first shell
outer most shell
they don't exist
in the nucleus
81
What are the properties of ionic compounds?
Good Conductors of electricity
High Melting Point
Solids
all of the above
82
Rutherford also discovered this about the nucleus...
It matches the atomic mass on the periodic table!
It has the same number of protons as the atomic number!
It is very small.
It has a positive charge.
83
Which of the following is a binary compound?
NaOH
N2
H3PO3
Pb3N4
84
what is a binary compound?
i do not know .
composed of one elements of lithium cation
composed of two elements can be either ionic or molecular
composed of two elements can be either polyatomic or nitrate
85
which bond transfers electrons?
ionic
covalent
double
man and dog
86
Is this a Bohr Diagram or a Lewis Dot Diagram?
Lewis Dot Diagram
Bohr Diagram
87
What is chemistry
what Jimmy feels for pink?
alchemy
the branch of science that deals with the identification of the substances
Mendes
88
Spontaneous reactions are
Spontiatic
Paragenic
Exergonic
Endergonic
89
The electron cloud has a positive charge
True
False
90
After balancing, which molecule of this chemical equation has the larger coefficient?
AlBr3
Al2(SO4)3
K2SO4
KBr
91
What is the Electron Orbital Notation of Hydrogen?
~5s↑↑
1s↑↓
1s↑↓2s↑↓2p↑↑↑
1s↑
92
What is the third step to balancing a chemical equation?
Check number of atoms of each side
Balance atoms one at a time by adjusting coefficients.
Write without the coefficients
List elements in the equation
93
what's a bohr model?
atomic model with energy levels
ion with a positive charge
the atom created by Bohr
Rutherford's brother's atom representation
94
How many electrons are in nitrogen?
14
0
12
7
95
How many dots on the Lewis Dot does this element have?
4
7
3
8
96
What is a polyatomic ion?
a molecule composed of only two nonmetal atoms
an atom or group of atoms having a net electric charge
a compound made with nonmetals bonded by sharing electrons
covalently bonded atoms that have electrical charge (+ or -)
97
What is the first step to balancing a chemical equation?
List elements in the equation
Write it without the coefficients
Balance atoms one at a time by adjusting coefficients.
Check number of atoms of each side
98
What do ionic compounds consist of?
Dissolve in water
Attracted by postive and negative charges
Made up of Ions
Take or Gain electrons
99
Which element has the lowest number of electrons
Br
Cl
F
Ar

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