Can You Pass This Toughest Chemistry Exam? Amos Quiz
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- 1.Atoms of the same element with different numbers of neutrons are called____.
- A.
Isotopes
- B.
Metals
- C.
Metalloids
- D.
Radioactive elements
- 2.A certain atom has 38 protons, 38 electrons, and 50 neutrons. Its mass number is ____.
- A.
12
- B.
38
- C.
88
- D.
126
- 3.Why are the nobles gases stable?
- A.
They were used by monarchies throughout history
- B.
They have a full number of outer electrons
- C.
They will not gain or lose electrons
- D.
Only b and c
- E.
All choices are correct
- 4.An atom with a different number of electrons than protons is a(n) ____.
- A.
Isotope
- B.
Atom
- C.
Ion
- D.
Nucleon
- 5.What periods and group, respectively, is barium found in?
- A.
6, 1
- B.
5, 2
- C.
2, 6
- D.
6, 2
- 6.Given the following information 12853I, how many electrons are present?
- A.
75
- B.
128
- C.
53
- D.
127
- 7.An atom is held together by the interactions of:
- A.
Protons and electrons
- B.
Protons and protons
- C.
Neutrons and electrons
- D.
All of the choices
- 8.An atom that has gained two electrons would have what charge?
- A.
-2
- B.
+2
- C.
-6
- D.
Neutral
- 9.Krypton is considered an inert atom. What makes Krypton such a stable atom?
- A.
8 electrons in the outer shell
- B.
More negative than positive charge
- C.
More positive than negative charge
- D.
None of the choices are correct
- 10.Atoms found in period 4, group16 are considered to be ...
- A.
Metalloids
- B.
Metals
- C.
Non-metals
- D.
Mental
- 11.In an atom, the atomic number is useful because a physical science student can determine the ...
- A.
Number of protons.
- B.
Number of quarks.
- C.
Atomic mass.
- D.
Ionic charge.
- 12.Current uses of nuclear energy are beneficial to humankind except for the:
- A.
Carbon dioxide pollution.
- B.
Dangerous waste products.
- C.
Efficient production of energy.
- D.
Limited amount of fuel.
- 13.For the element represented by 12752Te , calculate the new mass if it were to lose 4 neutrons.
- A.
124
- B.
52
- C.
123
- D.
48
- 14.How many valence electrons are found in oxygen?
- A.
6
- B.
2
- C.
8
- D.
Not enough information to determine
- 15.All atoms of a specific element have the same number of:
- A.
Ions
- B.
Protons
- C.
Neutrons
- D.
Electrons
- 16.The atomic mass of an atom is determined by the weight of:
- A.
Neutrons and protons
- B.
Neutrons and electrons
- C.
Protons and electrons
- D.
Protons only
- E.
Neutrons only
- 17.The splitting of an atom’s nucleus which releases a large amount of energy is called:
- A.
Fusion
- B.
Atomic lysis
- C.
Quark dispersement
- D.
Fission
- 18.Three of the four are BENEFITS of nuclear applications. Select the ONE that is NOT.
- A.
Detecting cancer
- B.
Risks of radiation exposure
- C.
Low carbon dioxide emissions
- D.
Abundant energy
- 19.When the nucleus of small atoms like Hydrogen are combined, a large amount of energy is released. Describe this process.
- A.
Fission
- B.
Nuclear emission
- C.
Fusion
- D.
Colloidal interactions
- 20.Three examples of physical changes are ____.
- A.
Freezing of water, evaporation of gasoline, and rusting of a nail
- B.
Boiling of water, bursting of a baloon, and melting of a candle
- C.
Sawing of wood, crushing of a can, and toasting a marshmallow
- D.
Burning of gasoline, rotting of an egg, and exploding of fireworks
- 21.The shape of an apple is a ____.
- A.
Chemical change
- B.
Chemical property
- C.
Physical change
- D.
Physical property
- 22.Molecules differ from atoms because ____.
- A.
Molecules form from electron sharing
- B.
Atoms form by covalent bonding
- C.
Molecules have a positively charged center called a nucleus
- D.
Atoms are composed of two elements
- 23.An atom is ____.
- A.
The smallest particle of an element that still retains the properties of the element
- B.
A substance formed from two or more elements
- C.
A neutral particle that forms as a result of electron sharing
- D.
A substance with atoms that are all alike
- 24.When two or more substances are combined so that each substance maintains its own properties, the result is a(n) ____.
- A.
Chemical change
- B.
Element
- C.
Compound
- D.
Mixture
- 25.All matter can be divided into these two larger sub divisions of _______________.
- A.
Pure substances and compounds
- B.
Pure substances and mixtures
- C.
Mixtures and elements
- D.
Elements and atoms.
- 26.Increasing the surface area of a solid ____.
- A.
Slows the speed of dissolving rate
- B.
Has no effect on the speed of dissolving rate
- C.
Increases the speed of dissolving rate
- D.
Causes the solid to ionize
- 27.Which of the following will speed up the dissolving of a solid solute in water?
- A.
Stir the solution
- B.
Cool the solution
- C.
Grind up the solvent
- D.
Freeze the solute
- 28.A solution that contains all of the solute it can normally hold at a given temperature is ____.
- A.
Dilute
- B.
Unsaturated
- C.
Supersaturated
- D.
Saturated
- 29.Matter that has a definite volume but no definite shape is a ____.
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
Plasma
- 30.Matter in which the particles are free to move in all directions until they have spread evenly throughout their container is a ____.
- A.
Solid
- B.
Liquid
- C.
Buoyant
- D.
Gas
- 31.The most common state of matter in the universe is ____.
- A.
Solid
- B.
Liquid
- C.
Gas
- D.
Plasma
- 32.The amount of energy needed to change a material from the solid state to the liquid state is the heat of ____.
- A.
Vaporization
- B.
Condensation
- C.
Fusion
- D.
Evaporation
- 33.The amount of energy needed to change a material from a liquid to a gas is the heat of ____.
- A.
Vaporization
- B.
Condensation
- C.
Fusion
- D.
Evaporation
- 34.A substance that produces H+ ions in solution is a(n)____.
- A.
Acid
- B.
Salt
- C.
Base
- D.
Soap
- 35.A substance that produces OH– ions in solution is a(n)____.
- A.
Acid
- B.
Salt
- C.
Base
- D.
Alcohol
- 36.A solution with a bitter taste and a slippery feel is most likely ____.
- A.
An acid
- B.
A base
- C.
A salt
- D.
An ester
- 37.HCl is the formula for ____.
- A.
The hydronium ion
- B.
Hydrochloric acid
- C.
Hydrogen peroxide
- D.
Sodium hydroxide
- 38.Why do the noble gases NOT form compounds readily?
- A.
Their outer energy levels are completely filled with electrons.
- B.
They have seven electrons in the outer energy levels.
- C.
They have no electrons.
- D.
They have empty outer energy levels.
- 39.Predict the charge of the ion that will form from elements in Groups 1 & 16, respectively.
- A.
+1 , -1
- B.
+1 , -2
- C.
+2 , +2
- D.
-1 , -2
- 40.Which will NOT affect the rate of a chemical reaction?
- A.
Concentration
- B.
Surface area
- C.
Temperature
- D.
Type of container
- 41.Many biochemical reactions in living systems would occur at a rate too slow to sustain life without the action of enzymes. What function do the enzymes perform?
- A.
Catalyst
- B.
Inhibitor
- C.
Reactant
- D.
Product
- 42.
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Which of the following is the correct lewis dot diagram for the given elements?- A.
A
- B.
B
- C.
C
- D.
D
- 43.Horizontal rows of the periodic table are called ____.
- A.
Clusters
- B.
Families
- C.
Groups
- D.
Periods
- 44.
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The illustrations show sealed containers, each of which contains a different substance. Which illustration represents gas molecules?- A.
A
- B.
B
- C.
C
- D.
D
- 45.Why is air considered a mixture?
- A.
Air is a gas.
- B.
Air contains only molecules.
- C.
The gases in air are physically mixed.
- D.
At extremely cold temperatures, air becomes a liquid.
- 46.How do molecules differ from atoms?
- A.
Atoms are composed of two elements.
- B.
Atoms are formed by covalent bonding.
- C.
Molecules have a positively charged center called a nucleus
- D.
Molecules are formed from two or more atoms.
- 47.What happens during nuclear fusion?
- A.
A large amount of mass is converted into a small amount of energy.
- B.
One nucleus with a large mass splits into smaller nuclei, releasing energy.
- C.
A chain reaction occurs when neutrons strike one another.
- D.
Two nuclei with low masses combine to form one nucleus of a larger mass, releasing energy.
- 48.Conductivity refers to a material’s ability to _____.
- A.
Bend light waves
- B.
Attract metal objects
- C.
Allow electric charges to pass through easily
- D.
Dissolves substances
- 49.
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What type of property is illustrated below?- A.
Physical
- B.
Chemical
- C.
Organic
- D.
Inorganic
- 50.Calculate the density of an object that has a mass of 20 g and a volume of 5 cm3.
- A.
15 g/cm3
- B.
4 g
- C.
5 g
- D.
4 g/cm3
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