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Standard XII
Chemistry
Uses of Lanthanides
Elements emit...
Question
Elements emitting radiations spontaneously have atomic number more than ____ .
A
70
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B
80
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C
82
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D
95
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Solution
The correct option is
C
82
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Similar questions
Q.
Regarding the assertion and reason, choose the correct option.
Assertion [A]: Radioactive elements emit different types of radiations spontaneously.
Reason [R]: Radioactive elements are unstable and undergo radioactive decay, emitting radiations in the process.
Q.
What happens to the atomic number of an element when
γ
-radiation, is emitted?
Q.
What happens to the atomic number of an element when
γ
radiation is emitted?
Q.
The radioactive element can decay to form an element of higher atomic number by emitting a _____________.
Q.
Assertion :Atomic number is a more fundamental property of an element than its atomic mass. Reason: Atomic number is equal to number of protons in an atom.
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