A cation is a positively charged ion, while an anion is a negatively charged ion. Cations are formed when an atom loses electrons, resulting in a net positive charge, while anions are formed when an atom gains electrons, resulting in a net negative charge. The charge of a cation is indicated by a superscript plus sign (+), while the charge of an anion is indicated by a superscript minus sign (-). **

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The charge of the zinc cation is +2. This means that the zinc atom loses two electrons to form a cation with a positive charge of +2. This charge allows the zinc cation to form ionic compounds with anions that have a charge of -2, such as oxide (O2-) or sulfide (S2-). **

The cation that has the noble gas configuration of helium is the helium cation, He+. This cation has lost one electron, leaving it with two electrons in its outer shell, which is the same configuration as helium. This gives it a stable and inert configuration similar to a noble gas. **

Cations are positively charged ions, while anions are negatively charged ions. Cations are formed when an atom loses one or more electrons, resulting in a net positive charge. Anions are formed when an atom gains one or more electrons, resulting in a net negative charge. One way to distinguish between cations and anions is to observe their behavior in a solution: cations are attracted to the negative electrode (cathode) in electrolysis, while anions are attracted to the positive electrode (anode). Additionally, cations are usually smaller in size than their parent atoms, while anions are larger. **

The sodium cation is connected to a chloride anion through ionic bonding. In this type of bonding, the sodium atom loses an electron to become a positively charged cation, while the chloride atom gains an electron to become a negatively charged anion. The opposite charges of the sodium cation and chloride anion attract each other, forming a strong bond between the two ions. This ionic bond creates a stable compound known as sodium chloride, or table salt. **

The formula for an oxonium cation is \( \text{H}_3\text{O}^+ \), which consists of a central oxygen atom bonded to three hydrogen atoms. The formula for a hydroxide anion is \( \text{OH}^- \), which consists of an oxygen atom bonded to a hydrogen atom. In aqueous solutions, oxonium cations and hydroxide anions are often involved in acid-base reactions, where oxonium cations act as acids and hydroxide anions act as bases. **

The nitrosyl cation (NO+) is a positively charged ion, while nitric oxide (NO) is a neutral molecule. The nitrosyl cation is a reactive species that can act as a strong oxidizing agent, while nitric oxide is a signaling molecule with various physiological functions in the body. Additionally, the nitrosyl cation is typically found in coordination complexes with transition metals, whereas nitric oxide is a diatomic molecule that can exist as a gas at room temperature. **