Isotopes of elements have same atomic numbers and different mass number(atomic masses).
A flood, if it hits the environment of the natural rubbers, would destroy how the rubber is being produced. to have a large amount of limitation, the flood would destroy a large percentage of rubber trees. This natural rubber is needed to make synthetic polymers. Without the rubber (because of damages to it's ecosystem through the flood), there would be a limited supply, and a substancial drop on synthetic polymers.
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If you could explain what “merkels” are, the question would be more clear.
The last one is the suns energy
Answer:
The boiling point of noble gas increases as you go down the group because the London dispersion forces increase.
