Answer in one or two word (VSA) I — task. Science State Board, Class 10.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. Who discovered natural radioactivity?

Natural radioactivity was first discovered by .

2. Which radioactive material is present in the ore of pitchblende?

The radioactive material present in the ore of pitchblende is .

3. Write any two elements which are used for inducing radioactivity?

(i)

(ii)

4. Write the name of the electromagnetic radiation which is emitted during a natural radioactivity.

The electromagnetic radiation which is emitted during a natural radioactivity is .

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15. Answer in one or two word (VSA) I