What is meant by radioactivity? Write two characteristics of alpha, beta and gamma rays.

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Solution

Elements with a high atomic number such as uranium, thorium, and radium have a property of spontaneously emitting invisible, highly penetrating and high energy radiation. This property is called radioactivity.

Characteristic.

Property

Alpha rays ()

Beta rays ( )

Gamma rays ( )

Charge

+2

-1

Electrically neutral

Deviation in the electric field

Attracted toward negatively charged plate

Attracted toward positively charged plate

Not deviated

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Property	Alpha rays ()	Beta rays ( )	Gamma rays ( )
Charge	+2	-1	Electrically neutral
Deviation in the electric field	Attracted toward negatively charged plate	Attracted toward positively charged plate	Not deviated