CHAPTER 2 REVIEWChemistry

A type of change involving the nucleus of an atom

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A. Physical changeB. Chemical

ChangeC. Nuclear ChangeD. A base

Digestion of starch in the mouth is a _________ _______

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A. Physical changeB. Chemical

ChangeC. Nuclear ChangeD. A base

A substance that has more OH- ions than H+ ions is a(an)

A. B. C. D.

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A. AcidB. BaseC. IonD. Solute

Anything that occupies space and has mass

A. B. C. D.

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A. WeightB. MatterC. CellD. Physical Change

Where are protons and neutrons located?

A. B. C. D.

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A. NucleusB. Electron cloudC. Energy levelsD. Neutrons

The atomic number of Oxygen is 8, which is also the number of

A. B. C. D. E. F.

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A. ProtonsB. NeutronsC. ElectronsD. Both A & BE. Both A & CF. Both B &C

Tearing a piece of paper is an example of ________?

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A. Physical changeB. Chemical

ChangeC. Nuclear ChangeD. A base

One Carbon atom has 6 neutrons and another carbon atom has 8 neutrons. The two atoms are

A. B. C. D.

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A. CompoundsB. IsomersC. IsotopesD. ions

In covalent bonds, electrons are …….

A. B. C. D.

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A. GainedB. LostC. SharedD. transferred

The number of atoms in 15 H2O is

A. B. C. D.

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A. 15B. 30C. 45D. 60

The number of molecules in 15 H2O is

A. B. C. D.

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A. 15B. 30C. 45D. 60

The energy required to start a chemical reaction is called

A. B. C. D.

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A. Activation energy

B. Potential energyC. Kinetic energyD. Inherent energy

Which of the following structures represents a diatomic molecule

A. B. C. D.

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A. NaClB. H-OC. H- C=C-HD. O=O

A substance dissolved in other substances is known as a

A. B. C. D.

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A. CompoundsB. LiquidC. SoluteD. Solvent

When a carnation is put in red colored water, the petals turn red because of

A. B. C. D.

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A. AdhesionB. CohensionC. Thermal energyD. Capillarity

A solution with a pH 8 is ____ times weaker than a pH 12

A. B. C. D.

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A. 100B. 1,000C. 10,000D. 100,000

The Loss of Electrons is called (hint LEO)

A. B. C. D.

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A. ReductionB. OxygenC. OrangeD. Oxidation

Which of the following is a balanced equation

A. B. C. D.

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A. C5H12 + O2 --->3 CO2 +2 H2O

B. Zn + HCl ---> 2ZnCl2 + H2

C. FeCl3 + NH4OH ---> Fe(OH)3 + NH4Cl

D. CH4 + 2 O2 ---> CO2+ 2H2O

A pizza, made of crust, sauce,sausage, and cheese(not baked), is an example of

A. B. C. D.

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A. An atomB. A compoundC. A moleculeD. A mixture

A paperclip floating on water is due to what?

A. B. C. D.

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A. GravityB. Surface tensionC. CapillarityD. Thermal energy

An atom is stable when…

A. B. C. D.

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A. Protons = Electrons

B. Its inner energy level is full

C. Its outer energy level is full

D. Protons > Electrons

Electrons, protons, and neutrons are respectively located ___ in relation to the nucleus

A. B. C. D.

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A. Inside, outside, inside

B. All in the nucleus

C. Outside, inside, outside

D. Outside, inside, inside

What mostly comprises the mass of an atom?

A. B. C. D. E.

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A. Protons B. Neutrons C. Electrons D. A and BE. All of the above

Which of the following are/is an example(s) of a diatomic molecule?

A. B. C. D. E.

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A. H2B. COC. F2D. A, B, and CE. A and C

If I make a salt water solution, identify the solvent and solute respectively.

A. B. C. D.

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A. Salt, waterB. Salt, salt waterC. Water, saltD. Salt water, salt

Which of the following is a correct molecular formula?

A. B. C. D.

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A. H-O-HB. 3CH4C. methaneD. H

H C H

H

Which of the following is an incorrect molecular formula?

A. B. C. D.

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A. CO2B. LiFC. Be3N2D. Na2Cl

A noble gas readily bonds with other atoms.

A. B.

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A. True B. False

Which of the following is not a chemical change?

A. B. C. D.

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A. Melting iceB. Burning woodC. Rusting ironD. The Statue of

Liberty turning green

Where are hydrogen bonds found?

A. B. C. D.

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A. CohesionB. AdhesionC. CapillarityD. All of the above

If the atomic # is changed, what is altered?

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A. The charge B. The element C. The mass

If you change the number of electrons, then what is altered?

A. B. C.

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A. The chargeB. The elementC. The mass

C12 and C14 are called isotopes because the number of ________is different in the atoms.

A. B. C. D.

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A. ElectronsB. ProtonsC. NeutronsD. Atoms

Endergonic reactions release energy?

A. B.

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A. TrueB. False

What kind of bonds hold water molecules together?

A. B. C. D.

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A. Ionic bondsB. hydrogen

bondsC. endergonic

bondsD. cement bonds

What kind of bonds have an unequal sharing of electrons?

A. B. C. D.

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A. HydrogenB. Ionic C. CovalentD. Polar Covalent

Which of the following numbers would indicate a strong acid?

A. B. C. D.

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A. 13B. 8C. 6D. 2

Which are the reactants in the equation below? 2 H+ + CO3

2− H2O + CO2

A. B. C. D.

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A. 2H, H2OB. 2H, CO2C. 2H, CO3D. H2O, CO2

Which of the following is NOT a way to make an atom stable?

A. B. C. D.

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A. Share electronsB. Give electrons awayC. Receive electronsD. Add neutrons