Final answer:
Hydrogen can never have more than two electrons in a Lewis dot structure due to the duet rule it follows. When drawing Lewis dot structures, you will only see at most two dots for hydrogen, representing a single covalent bond in the H:H notation.
Step-by-step explanation:
Hydrogen can never have more than two electrons in a Lewis dot structure. According to the duet rule, hydrogen is unique in that it only requires two electrons to fill its valence shell, compared to other elements that follow the octet rule. When drawing a Lewis dot structure for hydrogen, you will only ever see a maximum of two dots, representing its two valence electrons. These electrons can be shared with another atom, forming a single covalent bond, as depicted in the notation H:H.
An example of hydrogen following the duet rule is in the formation of a hydrogen molecule, consisting of two hydrogen atoms. Each hydrogen atom has one valence electron and by sharing them, they fill their valence shells, achieving stability. This sharing of electrons is represented by the Lewis structure notation H:H, with each hydrogen atom having a complete duet.