Match the pairs

Fill in the blanks.

A. The number of molecules of water of crystallization in washing soda is _____

B. The chemical name of baking soda is __________.

C. ________ is used in treatment of hyperthyroidism.

D. The chemical name of Teflon is ___________.

Write answers to the following

What is meant by radioactivity?

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When is said to be the nucleus unstable?

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Which diseases are caused by artificial food colours?