The process of joining two atoms’ nuclei and releasing an enormous amount of energy is called—

Neutron isotope

Nuclear meltdown

Nuclear fission

Nuclear fusion

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

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