Indiana Science Grade 8

Chapter 3: Inside the Atom

Section 2 Self-Check Quiz-Eng.

1.
The __________ of an element is the number of __________ of an atom of that element.
A)atomic mass; protons in the nucleus
B)mass number; neutrons in the nucleus
C)mass number; protons plus neutrons in the outermost energy level
D)atomic number; protons in the nucleus
2.
__________ are atoms of the same element that have different numbers of neutrons.
A)Compounds
B)Isotopes
C)Alpha particles
D)Beta particles
3.
The __________ of an isotope is the number of neutrons plus protons.
A)mass number
B)atomic number
C)nucleus number
D)half-life
4.
Why don't the protons in the nucleus of an atom repel each other?
A)They are far enough apart that their like charges do not repel each other.
B)They are held together by the strong nuclear force.
C)The negatively charged neutrons cancel the net positive charge of the protons in the nucleus.
D)The negative areas of protons are attracted to the positive areas of other protons and hold the nucleus together.
5.
Which of the following would cause a nucleus to be unstable?
A)equal numbers of protons and neutrons
B)protons and neutrons packed tightly in the nucleus
C)the release of an alpha particle from americium-241 in a smoke detector
D)too many neutrons
6.
__________ is the release of nuclear particles and energy.
A)Transmutation
B)Atomic half-life
C)Radioactive decay
D)Carbon dating
7.
The changing of one element into another through radioactive decay is called __________ .
A)nuclear fusion
B)periodic shift
C)transmutation
D)half-life
8.
The __________ of a radioactive isotope is the amount of time it takes for half of a sample of the element to decay.
A)atomic number
B)rate of degradation
C)transmutation rate
D)half-life
9.
Carbon-14 is useful in determining __________.
A)how fast a radioactive sample will decay
B)the best method for the disposal of a radioactive sample
C)the age of dead plants and animals
D)the age of sedimentary rock layers
10.
Elements created by artificial transmutations are called __________.
A)isotopes
B)alpha products
C)synthetic elements
D)degraded elements
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