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Intro to Chem 1 Final Exam Review Flashcards | StudBud
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Intro to Chem 1 Final Exam Review
Intro to Chem 1 Final Exam Review
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Study up for the Chem 1 Final!
Flashcards
54 cards
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Practice quiz
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Questions
54
Answers
1
What are physical properties?
Characteristics of matter that cannot be measured
Characteristics of matter that can be measured
2
Heating a substance causes its particles to...
Get heavier
Move slower
Move faster
Become more dense
3
What charge would sodium have as an ion?
+2
-2
+1
-1
4
How many valence electrons does Lithium have?
2
3
1
4
5
Atoms in the same period on the periodic table have...
The same atomic mass
The same atomic number
The same valence
The same number of energy levels
6
Atoms that steal electrons become
Positively charged
Negatively charged
7
More reactants in a reaction means more products formed because....
Too many products clogs the system
More heat is produced
More reactants takes up more space
More reactants means more atoms to form more product
8
Classify the following: CO2
Heterogeneous Mixture
Element
Compound
Homogeneous Mixture
9
What is a precipitate?
A gas dissolving in a liquid
A gas produced in a chemical reaction
One liquid mixing into another
A solid formed during the reaction of two liquids
10
What is the formula for density?
Mass / Volume
Weight / Mass
Volume / Weight
Volume / Mass
11
How many atoms are in a H2O molecule?
4
1
3
6
12
A rock occupying 60 cm^3 with a mass of 240g has a density of....
4 g/cm^3
.25 g/cm^3
240 g/cm^3
60 g/cm^3
13
Why is the sugar in water evenly dispersed throughout the mixture?
Water is extremely dense
The molecules are in random motion
The molecules are hot
Sugar is wicked small
14
In chemical reactions....
New atoms are created
Reactants remain unchanged
Atoms of reactants rearrange into new products
Atoms are destroyed forever
15
What does a catalyst do?
Stops a reaction
Increases the rate of a chemical reaction
Has nothing to do with chemistry
Decreased the rate of a chemical reaction
16
How are compounds and elements different?
Compounds have only one type of atom
Elements are not pure
Elements have different types of elements present
Compounds have different types of atoms
17
Atoms in the same family...
have the same atomic mass
have the same number of electrons
tend to have similar properties
have the same atomic number
18
What is Fluorine's valence?
5
7
8
6
19
Why does hot water dissolve an Alka Seltzer tablet faster?
Hot water molecules are larger
Hot water is super dense
Hot water molecules move more quickly
Alka seltzer hates heat
20
What happens during covalent bonding?
Atoms steal electrons and become charged
Electrons morph to become protons
Atoms are destroyed
Atoms share electrons to complete their valence shells
21
What charge would Oxygen have as an ion?
-2
+2
-1
+1
22
Melting an iron beam is an example of...
Physical Change
Chemical change
23
Which element has 7 protons in the nucleus?
Oxygen
Carbon
Nitrogen
Boron
24
If two objects have the same volume but one has more/smaller atoms tightly packed togethter...
One will float and one will sink
They have different volumes
One is more dense than the other
One is larger than the other
25
Classify the following: Salt water (NaCl + H2O)
Homogeneous Mixture
Hetergeneous Mixture
Element
Compound
26
What part of the atom is #1?
Proton
Electron
Neutron
27
What is an isotope?
A frozen tope
A variation of an atom with a different number of electrons.
A variation of an atom with a different number of neutrons.
A variation of an atom with a different number of protons.
28
Which atom places two electrons in the first energy level and six in the next?
Carbon
Boron
Oxygen
Nitrogen
29
Ionic bonds occur between
Noble gases only
Two non-metals
Metals and non-metals
Two metals
30
Heating a sample of a substance causes its volume to increase, why?
It becomes lighter
Its particles spread apart
The particles grow in size
Its on fire!
31
What part of the atom is #3
Electron
Proton
Neutron
32
What is density?
The amount of mass in a given space
How heavy something is
The amount of space an object takes up
The amount of matter in an object
33
Heating a chemical reaction generally...
reduces product volume
has no effect
increases reaction rate
decreases reaction rate
34
Number of atoms of reactants and products in a chemical reaction must always....
redistribute
be different
be the same
be unique
35
A chemical reaction that causes cooling (feels cold) is known as....
Static
Catalytic Converter
Endothermic
Exothermic
36
Atoms that give away electrons become...
Positively charged
Negatively charged
37
Elements in the same group on the periodic table....
Have the same number of electrons
Have the same symbol
Have the same valence
Have the same number of energy levels
38
What happens during a chemical change?
A new substance is formed
Molecules never touch each other
There are no observable changes
Chemicals are used
39
What does the 14 in "Carbon-14" represent?
Atomic number
Number of electrons
Half life
Atomic mass
40
A chemical reaction that releases heat (warms up) is known as....
Exothermic
Needs a catalyst
Endothermic
Static
41
Classify the following: O2
Compound
Homogeneous Mixture
Element
Heterogeneous Mixture
42
What does conservation of mass mean?
Same types an numbers of atoms in reactants and products
The mass of products remains the same during a reaction
The mass of reactants tends to fluctuate based upon products
Mass must be less in products
43
Atomic number is...
Negatively charged
Total number of atoms of that element in the universe
Number of neutrons in an atom
Number of protons in an atom
44
Burning a candle is an example of...
Chemical change
Physical Change
45
Covalent bonds occur between...
Two metals
A metal and a non-metal
Ions
Two Non-metals
46
What part of the atom is #2?
Neutron
Proton
Electron
47
Dissolving sugar in water is an example of...
Physical Change
Chemical Change
48
Number of electrons in a neutral atom are...
Same as atomic mass
Greater than that of protons
Same as number of protons
Less than that of protons
49
How do you determine the number of neutrons in an atom?
Atomic number times atomic mass
Use atomic number
Subtract atomic number from atomic mass
Its equal to atomic mass
50
How many molecules are represented in the following formula? 3 H2O
3
9
6
1
51
Why do ions have a charge?
They have an uneven number of electrons and neutrons
They have an unequal number of protons and electrons
The neutrons are energized
Different number of protons and neutrons
52
During ionic bonding...
Atoms share electrons
Atoms switch protons
One atom steals an electron from another
Both atoms steal electrons
53
Identify this atom based upon the electrons in its energy levels.
Boron
Oxygen
Nitrogen
Carbon
54
Classify the following: Chocolate Chip Cookie
Homogeneous Mixture
Element
Heterogeneous Mixture
Compound
