Please explain what the commonness and individuality are in chemistry and give another example.

Commonality means that some substances have the same properties. For example, it is common for acids to react with active metals to produce H2.

Personality: Nitric acid reacts with metal to produce nitric oxide instead of hydrogen. Nitric acid is easily digested. Nitrate ion n is +5, and its valence is greater than H+. According to the principle of redox reaction, whoever is strong will react first.