Final answer:
The Lewis dot diagram for hydrogen (H) shows one dot representing its one valence electron; hydrogen can form H+ (proton) or H- (hydride) ions. Hydrogen generally forms H+, shown without dots in its ionized state.
Step-by-step explanation:
The Lewis dot diagram for hydrogen (H) is simply represented by the symbol for hydrogen surrounded by one dot, which signifies its one valence electron. Since hydrogen can only have a maximum of two electrons in its valence shell, it can either lose its electron to become H+, known as a proton, or it can gain an electron to become H-, known as a hydride ion. The Lewis dot diagram for H would look like this: H.
When predicting the charge of an ion formed by hydrogen, we must consider that hydrogen tends to lose an electron during the formation of ionic compounds, thus becoming H+. This is also supported by hydrogen's position in the periodic table, where it is placed above Group 1 elements that typically form +1 ions.
In a Lewis diagram of two hydrogen atoms sharing electrons, the shared pair results in the depiction of a single covalent bond as H:H, signifying the sharing of two electrons between the two hydrogen atoms. When hydrogen forms an ion, the brackets and charge are not required since it is a monatomic ion, not a polyatomic ion.