Element with an electron sextet are _______.


“Sextet” atoms have lack of electrons and are eager to get two additional valence electrons to fill their octet.
In an element of a compound, the number of electrons in the valence shell is equal to 6, then it is called sextet of electrons.

Final answer:
“Sextet” atoms have lack of electrons and are eager to get two additional valence electrons to fill their octet.