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Chapter 18 Atomic and Nuclear Physics-7
1.
Who suggested that radioactivity was the result of the decay or disintegration of unstable nuclei?
a) Rutherford
b) Marie Curie
c) Democritus
d) Henry Becquerel
2.
What is the spontaneous emission of radiation by unstable nuclei called?
a) Nuclear transmutation
b) Natural radioactivity
c) Nuclear radioactivity
d) Natural transmutation
3.
What is the element called which emit radioactive radiations?
a) Isotopic elements
b) Radioactive elements
c) Transmitter elements
d) Radiance elements
4.
Which of the following type of radiation is usually emitted by a radioactive substance?
a) Sigma
b) Tara
c) Omega
d) Alpha
5.
What is the symbol for alpha rays?
a) Symbol: α
b) Symbol: Å
c) Symbol: β
d) Symbol: γ
6.
Which of the following type of radiation is usually emitted by a radioactive substance?
a) Sigma
b) Beta
c) Tara
d) Omega
7.
What is the symbol for beta rays?
a) Symbol: γ
b) Symbol: β
c) Symbol: Å
d) Symbol: α
8.
Which of the following type of radiation is usually emitted by a radioactive substance?
a) Tara
b) Gamma
c) Sigma
d) Omega
9.
What is the symbol for gamma rays?
a) Symbol: β
b) Symbol: γ
c) Symbol: α
d) Symbol: Å
10.
How many types of radiation are usually emitted by a radioactive substance?
a) Three
b) One
c) Two
d) Four
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