Octet means presence of a total of 8 electrons in its valence shell while in case of duplet only 2 electrons are present in valence shell.
Is the number of protons in an atom, or the total positive charge of an atom.
Answer: BF3
Explanation: boron needs 4 electron to obtain octet and Fluorine has just one. For the valence shell to be completely filled it will have to form BF4- with 4 fluorine atom surrounding it.
<span>The roman numeral 3 represents the oxidation of the metal, scandium. </span>
