Medical Quiz

Topics: Chemistry Quiz

the substance whicch extracted from a natural resources or prepared in lab. is :

A. fertilizer

B. medicine

C. dye

D. chemical compound

Select your answer:
     


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An atom…….

A. Is the smallest particle of an element that retains all the properties of that element.

B. Is anything that has mass and takes up space.

C. Has a positive charge

D. Has a negative charge