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Chemistry Test Review
Chemistry Test Review
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7th Grade Chemistry Test Review
Flashcards
43 cards
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Practice quiz
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Questions
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Answers
1
Why are they called "noble gases?"
They are at the end of the periodic table
They have full outer shells
They have peasants
They only need one more electron
2
Cl
-
represents a
Chlorine cation with negative 2 charge
Chlorine anion with a negative 2 charge
Chlorine cation with a negative 1 charge
Chlorine anion with a negative 1 charge
3
Carbon has how many valence electrons?
44
4
14
14-4
4
Which of these represents an isotope?
Carbon-14
Carbon-12
Na+
Chlorine
5
The coefficients for this balanced equation NH
3
+ H
2
SO
4
→ (NH
4
)
2
SO
4
are:
1, 2, 2
2, 1, 2
2, 1, 1
2, 2, 2
6
Deposition is...
Gas to solid
Liquid to gas
Solid to gas
Solid to liquid
7
This is an example of... (ice at high elevation)
Sublimation
Condensation
Deposition
Freezing
8
The first four elements in the actinide series
Are all manmade
Are U, Np, Pu and Am
Are the only actinides that occur naturally
Are numbers 57-60
9
Cell is to basic unit of life as ATOM is to...
Compound
Element
Psychology
Matter
10
The periodic table can be split up into two general groups. Choose the two groups.
Alkali metals and transitions metals
Metals and Nonmetals
Metals and Semimetals
Metals and Gases
11
A reaction makes new bonds. It most likely feels
Cold
Like room temperature
Warm
Like soap
12
Of the four, choose the most reactive.
Chlorine
Helium
Boron
Argon
13
A reaction makes new bonds. It is most likely...
Exothermic
Endothermic
Cold
A replacement
14
Why is plasma called ionized gas?
There are e- separate from the nucleus (can make ions)
iono
It moves very quickly
It is extremely cold
15
How many g are in 2 kg?
20
200
2
2000
16
True or False: A happy "helium" has 8 valence electrons.
False, it has 2 valence electrons
False, it has 7 valence electrons
False, it has 10 valence electrons
True
17
What is the arrangement of atoms in a liquid?
Spread apart
Random
Regular
Patterned
18
Hydrogen-3 represents what?
An isotope of hydrogen with 3 neutrons
An isotope of hydrogen with 3 neutrons and 3 protons
An isotope of hydrogen with 3 protons
An isotope of hydrogen with 2 neutrons and 1 proton
19
All of these are chemical properties EXCEPT
Boiling point
Reactivity
Radioactivity
Flammability
20
If you add heat, a compound will change phases in what order?
Liquid, Solid, Plasma, Gas
Solid, Liquid, Gas, Plasma
Solid, Liquid, Plasma, Gas
Solid, Gas, Liquid, Plasma
21
What are the correct coefficients for this balanced equation? H
2
+ O
2
→ H
2
0
2, 1, 2
2, 2, 2
1, 1, 1
2, 1, 1
22
Mrs. Reyes' 3 Be's are:
Be safe, Be yonce, Be Respectful
Be respectful, Be responsible, Be safe
Be safe, Be yonce, Be autiful
Be safe, Be respectful, Be regular
23
Which is an example of a homogeneous mixtures?
Your binder
Kool-aid
A bunch of M&Ms
A box of colored pencils
24
Negative charge is to anion as positive charge is to
Two anions
Dogion
Ion
Cation
25
What is the responding variable in this graph?
Heat Energy
Freezing
Phase changes
Temperature
26
Which of these represents an ion?
14C
22Na
Uranium-234
Cl-
27
Which atom does this represent?
Californium
Berkelium
Burger King
Barium
28
What is an example of vaporization?
Hail
Water boiling on a hot stove
Rain
Ice turning into liquid water
29
Which is NOT a part of the Carbon cycle?
Precipitation
Combustion
Photosynthesis
Fossilization
30
An endothermic reaction will feel
Like room temperature
Not hot or cold
Hotter
Colder
31
Give an example of an alkali metal.
Hydrogen
Chlorine
Carbon
Francium
32
What is the manipulated variable in this graph?
Heat Energy
Temperature
Phases
Not enough information
33
What type of reaction is this?
Decomposition
Replacement
Synthesis
Balanced
34
How is a double bond different from a single bond?
There are two atoms involved
They are sharing/borrowing 4 electrons (two pairs) total
It is double the fun
It is not as strong as a single bond
35
You've toasted bread. You know this is a chemical change because
Two liquids have made a solid
There is a new gas coming from the bread
You can eat it
The bread has turned a dark brown and black color
36
This person just got his hair cut. His haircut is an example of
A poor life decision
A chemical change
A phase change
A physical change
37
Why do electrons revolve around the nucleus?
So that they can bond with the protons
They're lonely and have no where else to go
They follow set tracks of movement
The protons attract them
38
Gas is to random arrangement as solid is to
Depends on the compound
Regular and Random Arrangement
Random Arrangement
Regular Arrangement
39
"F" Represents
My grade
A valence electron
An electron
A proton
40
P is the chemical symbol for
Lead
Potassium
Phosphorous
Pokemonium
41
Carbon is to 6 protons as nitrogen is to
9 protons
8 protons
17 protons
7 protons
42
A reaction breaks bonds. This is most likely...
Replacement
Exothermic
Hot
Endothermic
43
In chemistry, this represents a...
Chemical change
Phase change
Physical change
Delicious snack
