Conceptual Physics 11-14 Test (3)

Which of the following statements is true? A) There are only about 100 different kinds of atoms that combine to form all substances. B) An atom is the smallest particle known to exist. C) A large atom can be photographed with the aid of an ordinary microscope. D) There are thousands of different kinds of atoms that account for a wide variety of substances. E) None of these statements are true

A) There are only about 100 different kinds of atoms that combine to form all substances.

The smallest particle of those listed below is A) a quark. B) a neutron. C) a molecule. D) an atom. E) a proton.

A) a quark.

The chemical properties of matter come mostly from its A) electrons. B) protons. C) neutrons

A) electrons.

When carbon and oxygen atoms combine, energy is A) given off by the reaction. B) taken in by the reaction. C) not involved.

A) given off by the reaction.

If we doubled the magnifying power of the most powerful optical microscope in the world, we would A) still not be able to see or photograph an atom. B) be able to photograph individual atoms, even though we couldn't see them. C) be able to see individual atoms

A) still not be able to see or photograph an atom.

Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy given off when they recombine is A) the same. B) slightly less. C) much more. D) slightly more. E) much less.

A) the same.

Compared to the mass of a hydrogen atom, the mass of an oxygen atom is A) 12 times as great. B) 16 times as great. C) 8 times as great. D) appreciably more than 16 times as great.

B) 16 times as great.

What is the molecular mass of a water molecule? A) 10 amu B) 18 amu C) 15 amu D) 12 amu E) None of these. It depends on the temperature.

B) 18 amu

How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when there is an electric current through it? 33) A) 1 B) 2 C) 3 D) 4 E) But protons will have to be subtracted, not added.

B) 2

1) An atomic mass unit (amu) is 1/12 the mass of A) a hydrogen atom. B) a carbon atom. C) an electron. D) a proton. E) a uranium atom

B) a carbon atom.

A positron orbiting an antiproton would make up an atom of A) positronium. B) anti-hydrogen. C) anti-helium. D) unobtainium. E) none of these

B) anti-hydrogen.

If a pair of helium nuclei are fused together, the result is A) helium isotope. B) beryllium. C) lithium. D) boron. E) carbon.

B) beryllium.

A floating ice cube contains spall pieces of iron. During melting the water level will A) rise B) fall C) remain unchanged

B) fall

Which has the greatest number of protons in its nucleus? A) mercury. B) lead. C) gold. D) silver.

B) lead.

The weight of matter comes mostly from its A) neutrons B) protons. C) electrons

B) protons.

Assuming all the atoms exhaled by Julius Caesar in his last dying breath are still in the atmosphere, then we probably breathe one of those atoms with each A) ten years. B) single breath. C) month. D) day. E)It depends-some people still breathe a few of Caesar's atoms every day, while others wouldn't breathe one for an entire year

B) single breath.

A factor that usually determines whether a substance is in the solid, liquid, gaseous, or plasma state is its A) composition. B) temperature. C) atomic shell configuration. D) atomic number. E) none of these

B) temperature.

There are about as many atoms of air in our lungs at any moment as there are breaths of air in the atmosphere of A) the United States. B) the whole world. C) a large auditorium. D) a large city. E) none of these

B) the whole world.

Which of the following is not a compound? A) water B) ammonia C) air D) salt E) All are compounds

C) air

The pressure of a liquid depends on liquid A) depth B) density C) both of these D) neither

C) both of these

In a closed bottle are a certain number of hydrogen molecules. In an identical closed bottle at the same temperature and internal pressure are a certain number of nitrogen molecules. The bottle with the greater number of molecules is the one containing A) nitrogen. B) hydrogen. C) both the same

C) both the same

The volume of matter comes mostly from its A) protons. B) neutrons C) electrons.

C) electrons.

If one neutron is added to a helium nucleus, the result is A) hydrogen. B) lithium. C) helium. D) beryllium. E) boron

C) helium.

A molecule has A) energy B) structure C) mass D) all of these E) none of these

D) all of these

The air in this room has A) weight B) mass C) energy D) all of these E) none of these

D) all of these

Nuclei of atoms that make up a newborn baby were made in 19) A) the mother's womb. B) the food the mother eats before giving birth. C) the Earth. D) ancient stars. E) none of these

D) ancient stars.

A positron orbiting an antiproton would make up an atom of A) anti-helium B) positronium C)unobtainium D) anti-hydrogen E) none of these

D) anti-hydrogen

If two protons are removed from an oxygen nucleus, the result is A) helium. B) neon. C) nitrogen. D) carbon. E) positively charged oxygen

D) carbon.

Surface tension of liquids A) is the reason a steel ship will float B) increases when wetting agents C) results from a thin molecular membrane beneath the liquid surface D) decreases as the liquid temperature increases E) is about the same for all liquids

D) decreases as the liquid temperature increases

Solid matter is mostly empty space. The reason solids don't fall through one another is because A) atoms are constantly vibrating, even at absolute zero. B) of gravitational forces. C) of nuclear forces. D) of electrical force E) none of these

D) of electrical force

Brownian motion has to do with the A) first direct measurement of atomic motion. B) rhythmic movements of atoms in a liquid. C) size of atoms. D) random motions of atoms and molecules. E) atomic vibrations.

D) random motions of atoms and molecules.

Which of these atoms has the greatest number of electrons? A) carbon B) helium C) gold D) uranium E) iron

D) uranium

Which of these atoms has the most mass? A) lead B) iron C) hydrogen D) uranium E) All have the same mass.

D) uranium

To change mercury into gold, a pair of protons must be A) added to the gold nucleus. B) removed from the mercury nucleus. C) removed from the gold nucleus D) added to the mercury nucleus. E) None of the above is true.

E) None of the above is true.

Which of the following is not a mixture? A) air B) granite C) beach sand D) cake E) None. All of the above choices are mixtures.

E) None. All of the above choices are mixtures.

If two protons are added to an oxygen nucleus, the result is A) nitrogen. B) heavy oxygen. C) fluorine. D) sodium. E) neon

E) neon.