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Still More on Parts of the Atom - P. 494
1) The volume of an atom is mostly made up of _____
A) neutrons.
B) empty space.
Physical Science Classwork 02/15/17
PS.05, 06, / SI 07, 08, 13
C) electrons.
2) What particles form the nucleus of an atom?
A) protons and electrons
B) electrons only
D) neutrons and electrons
E) all of the above
1)
D) protons.
C) protons and neutrons
F) None of the above
3) The atomic number of an element is the total number of which particles in the nucleus?
3)
4) The atomic number of an element whose atoms have 9 protons and 10 neutrons is _____.
4)
5) All atoms of the same element have the same _____.
A) mass numbers
C) number of protons
2)
5)
B) mass
D) number of neutrons
6) Different elements always have different numbers of _____ compared to each other.
A) protons
B) neutrons
C) subatomic particles
D) all of the above
6)
7) Which element has an atomic number of 65?
7)
8) Which element has 78 protons?
8)
MASS NUMBER - P. 494
9) The only subatomic particle that does not carry an electric charge is the __________.
10) Which subatomic particle has the greatest mass?
9)
10)
11) Select the correct statement about subatomic particles.
A) Electrons, protons, and neutrons all have the same mass.
B) Protons are positively charged and the lightest subatomic particle.
C) The mass of a neutron nearly equals the mass of a proton.
D) Electrons are negatively charged and are the heaviest subatomic particle.
E) Neutrons have no charge and are the lightest subatomic particle.
11)
12) Which of the following is correct concerning subatomic particles?
A) The electron was discovered by Goldstein in 1886.
B) Cathode rays were found to be made of protons.
C) The proton was discovered by Thomson in 1880.
D) Canal rays were found to be made of protons, electrons, and neutrons.
E) The neutron was discovered by Chadwick in 1932.
12)
13) What was there about Chadwick's personality as a college student that led him to have such an influence on
human history?
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14) After Chadwick discovered the neutron, what did he realize was inevitable? (Hint: why did he start having to
take sleeping pills?
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15) What was the occasion that caused the physicist J. Robert Oppenheimer to say "I am become death, the
destroyer of worlds"?
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16) What did atomic bombs have to do with a certain type of bathing suit?
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ISOTOPES - P. 496
17) Atoms with the same number of protons but different numbers of neutrons are called
17)
18) Iodine-131 and iodine-127 are examples of _____.
18)
19) In what way are two isotopes of the same element different?
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20) Explain why isotopes of the same element have the same chemical behavior.
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21) Which of these statements is NOT true?
A) Atoms of the same element can have different masses.
B) Atoms are mostly empty space.
C) Atoms of isotopes of an element have different numbers of protons.
D) The nucleus of an atom has a positive charge.
21)
22) Isotopes of the same element have different _____.
A) chemical behavior
C) symbols
E) mass numbers
22)
B) atomic numbers
D) numbers of protons
F) positions on the periodic table
23) The mass number of an atom is equal to _____.
A) the total number of electrons in the nucleus
B) less than twice the atomic number
C) the total number of protons and neutrons in the nucleus
D) a constant number for the lighter elements
24) The mass number of an element whose atoms have 12 protons and 13 neutrons is _____.
25) Compare and contrast:
23)
24)
mass number vs. atomic number.
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