Which feature improves the safety of small modular reactors (SMRs)? They use control rods to slow the reaction.

They can be installed underground.

They require less onsite preparation.

They produce less waste.

They can be installed underground.

Explanation:

Keeps the reactor coolant water under high pressure to prevent it from boiling.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.