Question 1

How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when an electric current is in it?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) none of the above 
A) 1 
B) 2 
C) 3 
D) 4 
E) none of the above

Question 2

The number of protons in a neutral atom is balanced by an equal number of

Accepted Answer

A) electron shells that surround the nucleus. 
B) neutrons in the nucleus. 
C) orbital electrons. 
D) none of the above 
A) electron shells that surround the nucleus. 
B) neutrons in the nucleus. 
C) orbital electrons. 
D) none of the above

Question 3

If we doubled the magnifying power of the most powerful optical microscope in the world, we would

Accepted Answer

A) be able to see individual atoms. 
B) be able to photograph individual atoms, even though we couldn't see them. 
C) still not be able to see or photograph an atom. 
A) be able to see individual atoms. 
B) be able to photograph individual atoms, even though we couldn't see them. 
C) still not be able to see or photograph an atom.

Question 4

Which is the smallest particle?

Accepted Answer

A) molecule 
B) atom 
C) proton 
D) neutron 
E) quark 
A) molecule 
B) atom 
C) proton 
D) neutron 
E) quark

Question 5

Atoms heavier than helium were at one time manufactured by

Accepted Answer

A) photosynthesis. 
B) thermonuclear fusion. 
C) radiant energy conversion. 
D) radioactivity. 
E) none of the above 
A) photosynthesis. 
B) thermonuclear fusion. 
C) radiant energy conversion. 
D) radioactivity. 
E) none of the above

Question 6

An atomic mass unit (amu)is 1/12 the mass of

Accepted Answer

A) an electron. 
B) a proton. 
C) a hydrogen atom. 
D) a carbon atom. 
E) a uranium atom. 
A) an electron. 
B) a proton. 
C) a hydrogen atom. 
D) a carbon atom. 
E) a uranium atom.

Question 7

Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy released when they recombine is

Accepted Answer

A) slightly more. 
B) slightly less. 
C) much more. 
D) much less. 
E) the same. 
A) slightly more. 
B) slightly less. 
C) much more. 
D) much less. 
E) the same.

Question 8

Although solid matter is mostly empty space, we don't fall through the floor because

Accepted Answer

A) atoms are constantly vibrating, even at absolute zero. 
B) of nuclear forces. 
C) of gravitational forces. 
D) of electrical forces. 
E) none of the above 
A) atoms are constantly vibrating, even at absolute zero. 
B) of nuclear forces. 
C) of gravitational forces. 
D) of electrical forces. 
E) none of the above

Question 9

Which is the lightest particle?

Accepted Answer

A) proton 
B) electron 
C) neutron 
D) all about the same 
A) proton 
B) electron 
C) neutron 
D) all about the same

Question 10

When oxygen and hydrogen gases combine, the result is

Accepted Answer

A) water. 
B) methane. 
C) a noble gas. 
A) water. 
B) methane. 
C) a noble gas.

Question 11

Which of these investigators did NOT contribute to our knowledge of atoms?

Accepted Answer

A) Aristotle 
B) John Dalton 
C) Robert Brown 
D) Albert Einstein 
A) Aristotle 
B) John Dalton 
C) Robert Brown 
D) Albert Einstein

Question 12

Two protons removed from an oxygen nucleus result in

Accepted Answer

A) nitrogen. 
B) carbon. 
C) helium. 
D) neon. 
E) positively charged oxygen. 
A) nitrogen. 
B) carbon. 
C) helium. 
D) neon. 
E) positively charged oxygen.

Question 13

Two protons added to an oxygen nucleus produce

Accepted Answer

A) heavy oxygen. 
B) fluorine. 
C) neon. 
D) sodium. 
E) nitrogen. 
A) heavy oxygen. 
B) fluorine. 
C) neon. 
D) sodium. 
E) nitrogen.

Question 14

Brownian motion is caused by

Accepted Answer

A) thermal agitation. 
B) perpetual motion. 
C) particles larger than atoms bumping into them. 
D) interactions between atoms and molecules. 
E) almost invisible bugs. 
A) thermal agitation. 
B) perpetual motion. 
C) particles larger than atoms bumping into them. 
D) interactions between atoms and molecules. 
E) almost invisible bugs.

Question 15

Which contains more atoms?

Accepted Answer

A) 1 kg of hydrogen 
B) 1 kg of iron 
C) both contain the same 
A) 1 kg of hydrogen 
B) 1 kg of iron 
C) both contain the same

Question 16

A granite block is mostly empty space because the atoms in the granite are

Accepted Answer

A) in perpetual motion. 
B) mostly empty space themselves. 
C) held together by electrical forces. 
D) not as close together as they could be. 
E) invisible. 
A) in perpetual motion. 
B) mostly empty space themselves. 
C) held together by electrical forces. 
D) not as close together as they could be. 
E) invisible.

Question 17

Heavy atoms are not appreciably larger in size than light atoms because the nuclei of heavy atoms have more

Accepted Answer

A) mass. 
B) electric charge. 
C) nucleons. 
D) all of the above 
E) none of the above 
A) mass. 
B) electric charge. 
C) nucleons. 
D) all of the above 
E) none of the above

Question 18

A uranium atom is 238 times as massive as a hydrogen atom. Compared with the diameter of a hydrogen atom, uranium's size is

Accepted Answer

A) slightly smaller. 
B) only slightly larger. 
C) is much larger, but less than 238 times as large. 
A) slightly smaller. 
B) only slightly larger. 
C) is much larger, but less than 238 times as large.

Question 19

A nucleon has a mass of about

Accepted Answer

A) 1 amu. 
B) 1 atomic mass unit. 
C) both are the same. 
D) none of the above 
A) 1 amu. 
B) 1 atomic mass unit. 
C) both are the same. 
D) none of the above

Question 20

Heavier atoms are not proportionally larger than lighter atoms due to the greater number of protons

Accepted Answer

A) pulling surrounding electrons into tighter shells. 
B) squeezed into tighter spaces. 
C) both of these 
D) none of these 
A) pulling surrounding electrons into tighter shells. 
B) squeezed into tighter spaces. 
C) both of these 
D) none of these

Exam 11: Atomic Nature of Matter

How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when an electric current is in it?

The number of protons in a neutral atom is balanced by an equal number of

If we doubled the magnifying power of the most powerful optical microscope in the world, we would

Which is the smallest particle?

Atoms heavier than helium were at one time manufactured by

An atomic mass unit (amu)is 1/12 the mass of

Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy released when they recombine is

Although solid matter is mostly empty space, we don't fall through the floor because

Which is the lightest particle?

When oxygen and hydrogen gases combine, the result is

Which of these investigators did NOT contribute to our knowledge of atoms?

Two protons removed from an oxygen nucleus result in

Two protons added to an oxygen nucleus produce

Brownian motion is caused by

Which contains more atoms?

A granite block is mostly empty space because the atoms in the granite are

Heavy atoms are not appreciably larger in size than light atoms because the nuclei of heavy atoms have more

A uranium atom is 238 times as massive as a hydrogen atom. Compared with the diameter of a hydrogen atom, uranium's size is

A nucleon has a mass of about

Heavier atoms are not proportionally larger than lighter atoms due to the greater number of protons

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