Related Questions

240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
The atomic number of a radioactive element is not changed, when it emits __________ rays.
A α
B β
C γ
D α & β
Which among the following is a positively charged particle emitted by a radioactive element?
A Beta ray
B Alpha ray
C Cathode ray
D Gamma ray
Which of the following is a radioactive element?
A Na
B Cr
C Am
D Al
Which scientist discovered the radioactive element radium?
A Isaac Newton
B Marie Curie
C Benjamin Franklin
D None of these
The disintegration rate of a radioactive element
A Progressively increases
B Progressively decreases
C Remains constant throughout
D May increase or decrease depending on the material
The half life period of a radioactive element depends upon the
A Temperature
B Pressure
C Amount of element present
D None of these
The half life period of a radioactive element depends on its
A Temperature
B Pressure
C Amount
D None of these
The lightest radioactive element is
A Radium
B 5th Uranium
C Tritium
D Protium

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