You have been given an unknown plastic. You investigate and find out that the unknown plastic sinks in water but floats on dish soap.

Which plastic do you have?

A. PET

B. HDPE

C. PVC

D. PS

D:PS

Explanation:

Looking at the table we can see that PS floats on dish soap and sinks in water.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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let that person have a turn to speak : )