The valence electrons are those found in the highest energy and ___ orbitals ^Please help ASAP I’ll mark you as brainlister FILL in the blank

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

a polar bond is formed when electrons are shared unevenly between atoms