7/21/2019 Radioactive

http://slidepdf.com/reader/full/radioactive-56da467787e54 1/1

Radioactive

Uranium is a radioactive .Radioactive is a property of

some atoms that are so unstable that they break up, all

by themselves. They re out particles or rays. Whenthey do this, it’s called Radioactive Decay.

• And there’s the problem !ecause radioactive

substances can cause sickness, burns, cancer and

even death.

• "ven thou#h it’s dan#erous, radioactivity can be

useful too. $or "%& 'ithout it, you mi#ht not be

able to turn your li#ht on.• (uclear po'er stations use radioactivity to

#enerate electricity for millions of people.

• )amma rays are used like hi#hpo'ered % rays to

look for cracks in metal parts.

• *n medical, radiotherapy uses radiation to kill

cancer cells.

•+moke detectors contain a radioactive elementcalled Americum.

• *n papermakin#,, radioactivity is used to make

sure that the paper is the ri#ht thickness.

• arbon datin# is used to nd out ho' old once

livin# ob-ects 'ood , bone, buildin#s etc/ is by

measurin# the amount of carbon01 a

radioisotope/ it contains.

• Radioactive substances #ive out three types of

radiation & Alpha, !eta and )amma Radiation.

(ame & 2imanshu 3. !aid , lass 4th A.