History of Discovery of Radioactivity

Who discovered X-ray accidentally while taking an x-ray photograph

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Who discovered alpha ray that is emitted from the nucleus of uranium-238

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Who discovered gamma ray that is emitted from the nuclei of radium and polonium?

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Who won Nobel Price because of discovery in radioactivity?

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Which of the following are radioactive radiation?

• alpha, α

• theta, θ

• beta, β

• gamma, γ

• delta, δ

Which of the following are radioactive radiation in the form of particle?

• alpha, α

• theta, θ

• beta, β

• gamma, γ

• delta, δ

Which of the following are radioactive radiation in the form of radioactive ray?

• alpha, α

• theta, θ

• beta, β

• gamma, γ

• delta, δ

SI unit for radioactivity

• Aq

• Bq

• Ci

• Fahrenheit

Unit used in radioactivity

• Aq

• Bq

• Ci

• Fahrenheit

time taken for the number of undecayed nuclei to be reduced to half of its original value

this is also known as