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Reach For The Top (Trivia For Alex) > Chem Trivia > Flashcards

Chem Trivia Flashcards

(83 cards)

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1
Q

What is the chemical symbol for water?

A

H2O

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2
Q

True or False: The atomic number of an element represents the number of protons in its nucleus.

A

True

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3
Q

Fill in the blank: The process of a liquid turning into a gas is called _______.

A

evaporation

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4
Q

What is the smallest unit of an element that retains its properties?

A

atom

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5
Q

Which of the following is a noble gas? (A) Oxygen (B) Neon (C) Nitrogen

A

B) Neon

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6
Q

What is the pH level of pure water?

A

7

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7
Q

True or False: All metals are good conductors of electricity.

A

False

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8
Q

What type of bond involves the sharing of electron pairs between atoms?

A

covalent bond

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9
Q

What is the term for the number of protons and neutrons in the nucleus of an atom?

A

mass number

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10
Q

Fill in the blank: The _______ is the central part of an atom containing protons and neutrons.

A

nucleus

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11
Q

Which particle has a negative charge?

A

electron

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12
Q

What is the main gas found in the Earth’s atmosphere?

A

nitrogen

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13
Q

True or False: Chemical reactions can create or destroy atoms.

A

False

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14
Q

What is the name of the table that organizes all known elements?

A

periodic table

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15
Q

Which of the following is a characteristic of acids? (A) Bitter taste (B) Sour taste (C) Slippery feel

A

B) Sour taste

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16
Q

What do you call a substance that speeds up a chemical reaction?

A

catalyst

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17
Q

Fill in the blank: The chemical formula for table salt is _______.

A

NaCl

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18
Q

What is the process of a gas turning into a liquid called?

A

condensation

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19
Q

True or False: Isotopes of an element have the same number of protons but different numbers of neutrons.

A

True

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20
Q

What is the most abundant element in the universe?

A

hydrogen

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21
Q

Which part of the atom has no charge?

A

neutron

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22
Q

What is the state of matter with a definite shape and volume?

A

solid

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23
Q

Fill in the blank: The _______ is the outermost shell of an atom where electrons reside.

A

valence shell

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24
Q

What type of reaction involves the combination of two or more substances to form a new compound?

A

synthesis reaction

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25
Which element is represented by the symbol 'Fe'?
iron
26
True or False: Bases turn litmus paper red.
False
27
What is the term for the energy required to break a bond in a molecule?
bond energy
28
What is the chemical formula for carbon dioxide?
CO2
29
Fill in the blank: A _______ solution has a pH less than 7.
acidic
30
What do you call a mixture where the components are evenly distributed?
homogeneous mixture
31
Which of the following is a diatomic molecule? (A) O2 (B) CO (C) N2
A) O2
32
What is the primary gas produced during photosynthesis?
oxygen
33
True or False: The law of conservation of mass states that mass can be created or destroyed in chemical reactions.
False
34
What is the name of the horizontal rows in the periodic table?
periods
35
Fill in the blank: The _______ of an element is the average mass of all its isotopes.
atomic weight
36
What type of reaction occurs when a compound breaks down into simpler substances?
decomposition reaction
37
Which element is represented by the symbol 'Au'?
gold
38
True or False: Ionic bonds form between metals and nonmetals.
True
39
What is the process of a solid turning directly into a gas called?
sublimation
40
Fill in the blank: The _______ of a liquid is the temperature at which it boils.
boiling point
41
What is the term for a negatively charged ion?
anion
42
Which of the following is a property of metals? (A) Brittle (B) Malleable (C) Poor conductor
B) Malleable
43
What is the name of the vertical columns in the periodic table?
groups
44
True or False: A chemical formula indicates the number and type of atoms in a molecule.
True
45
What is the term for a positively charged ion?
cation
46
Fill in the blank: The _______ is the measure of how much matter is in an object.
mass
47
What type of reaction involves the release of energy, often in the form of heat?
exothermic reaction
48
Which element is a liquid at room temperature?
mercury
49
True or False: Nonmetals are typically good conductors of heat and electricity.
False
50
What is the chemical formula for ammonia?
NH3
51
Fill in the blank: The _______ is the force that holds atoms together in a molecule.
chemical bond
52
What is the term for the temperature at which a solid becomes a liquid?
melting point
53
Which of the following elements is a halogen? (A) Chlorine (B) Helium (C) Sodium
A) Chlorine
54
What is the process of a solid turning into a liquid called?
melting
55
True or False: The periodic table is arranged by increasing atomic mass.
False
56
What is the term for a reaction that absorbs energy?
endothermic reaction
57
Fill in the blank: The _______ of a solution is a measure of how much solute is dissolved in a solvent.
concentration
58
What is the chemical symbol for the element carbon?
C
59
True or False: Acids have a pH greater than 7.
False
60
What is the term for the ability of a substance to dissolve in another substance?
solubility
61
Which of the following is a common property of bases? (A) Sour taste (B) Slippery feel (C) Turns blue litmus red
B) Slippery feel
62
What is the chemical formula for glucose?
C6H12O6
63
Fill in the blank: The _______ is the part of a solution that is dissolved.
solute
64
What is the term for the change of state from gas to solid?
deposition
65
True or False: All liquids have a definite shape.
False
66
What is the chemical symbol for sodium?
Na
67
What type of reaction occurs when two substances exchange ions?
double displacement reaction
68
Fill in the blank: A _______ reaction involves the combination of oxygen with a substance, releasing energy.
combustion
69
What is the term for the energy stored in chemical bonds?
chemical energy
70
True or False: All acids contain hydrogen.
True
71
What is the process called when a gas changes to a solid without becoming a liquid first?
deposition
72
Which of the following is a characteristic of metals? (A) Dull appearance (B) Good conductivity (C) Low density
B) Good conductivity
73
What is the chemical formula for sulfuric acid?
H2SO4
74
Fill in the blank: The _______ is the part of a solution that does the dissolving.
solvent
75
What is the name of the reaction that occurs when an acid reacts with a base?
neutralization reaction
76
True or False: Chemical changes can be reversed easily.
False
77
What is the term for the amount of space an object occupies?
volume
78
What is the chemical symbol for chlorine?
Cl
79
Fill in the blank: A _______ is a change in which one or more substances are converted into different substances.
chemical reaction
80
Which of the following is a property of nonmetals? (A) Malleable (B) Good insulator (C) High melting point
B) Good insulator
81
What is the term for the process of separating a mixture based on differences in boiling points?
distillation
82
True or False: The density of a substance is its mass divided by its volume.
True
83
What is the chemical formula for hydrogen peroxide?
H2O2

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