Answer:
The stable isotopes of carbon are carbon-12 (12C) and carbon-13 (13C).
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The element used to make the first atomic bomb is uranium
Answer:
the first one is the answer
When landfills have a very poor maintenance, it would likely result in the release of harmful gases into the atmosphere. Among these poisonous gases released are carbon dioxide and methane in which if inhaled in an excessive amount, it could cause respiratory illnesses or it could be fatal.