18. Americium - 241 has a half life of 432 years. If you have 25g of Americium - 241, how much will you have left after 864 years * 12.5g 25g 50g O 241g 19. A radioisotope has a half life of 2 minutes. How many half lifes have passed after 10 minutes? * O 2 O 5 8. О 10

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Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.